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List of Vintage Hand-held Calculators
&
Addendum to 'The Collector's Guide to Pocket Calculators'
"C–D"

The Collector's Guide to Pocket Calculators lists over 1,500 models of early pocket calculators from over 220 companies and provides an excellent source of information on early hand-held calculators.  However, since it was published further models have come to light and are listed here.

If you have an early pocket calculator (from the 1970s with LED, vacuum fluorescent, discharge, or early LCD display, and battery powered) which is not in The Collector's Guide, please email the details as in the list below for inclusion here.

Details for each calculator are required in the format used in the book, and below:
Manufacturer or Trading Company, Model Name or Number (there may be more than one), Functions, Display Type, Battery type (and if rechargeable), Size, Country of Manufacture, any Interesting Features.

A small frontal photograph (jpeg format, about 600 pixels max dimension) of each would be useful and will be included with the details if of good quality.
Please email with details.

New Calculators

Latest Update - latest additions have the date added.

Go to   C   D

 

C

C011X (Only name on calculator.  German company?)

• C011X, 4-function, %, square root, blue VFD, 3-AA rep. batt., Korea, label written in German.

Calate (Manufactured by Advanced Telecommunications Equipment Ltd., Woking, England. See also Supacal.)

• 8, 4-function, red LED, 9v PP3 rep. batt., 78x156x24mm / 3.1x6.1x0.9", England, has a membrane keypad. Photo . Featured on British Calculator site.
• Calate (possibly Calate II), 4-function, membrane keypad.
• Supacal, 4-functions, red LED,  2- AA rech. batt., 80x142x47mm / 3.1x5.6x1.8", England, has a membrane keypad and uses rotary switches, was also available as a self-assembly kit. Photo. Featured on British Calculator site.

Calcom (Calcom Electronics, New Delhi, India)

• 35, scientific programmable, 8 digits mantissa & 2 digits exponent green VFD, 4-AA rep. batt.

Calconsa (CALCONSA AG, ZURICH)

• TA-9, 4-function, memory, U.S.A., similar to RES Mark IX.
• TA-33 Electronic Calculator, 4-function, separate VFD tubes, 4-C rep. batt. in battery pack, can also take an AC-power pack, Japan.

CalcuCounter

• 362, 4-function, %, memory, red display, 4-AA rep. batt., Taiwan
• Calcucounter, 4-function, %, memory, timer, extra large red display.

Calculated Industries

• Loan Arranger II, listed in book. Photo.

Calculighter

• Calculighter, combined calculator and cigarette lighter, 4-function, %, red LED, Japan.

Calculo

• Calculo (no model number), 4-function, amber gas-discharge in separate tubes, 4-C rep. batt., battery-level meter, Japan.
• K-80M, 4-function, separate tubes, 4-C rech. batt., battery-level meter, Japan.

Calculor

• 488, 4-function, %, square root, square, reciprocal, pi, memory, green VFD, 2-AA rep. batt.

Calcumatic (Leisurecraft Products Ltd., U.S.)

• 840, listed in book.
• 860, listed in book. Photo.
• 870, listed in book.

Calcu-pen (made in Japan, may have been manufactured by, or for, Satolex Corporation)

• Calcu-pen, LED, listed in book. Featured calculator.
• Satolex Calcupen, 4-function, %, early yellow LCD, button cells, has a separate small button for each number unlike the LED version.

Calcutron

• 802, 4-function, red LED, 4-AA rep batt. Hong Kong, instruction booklet shows Abatron 802. Photo , in wallet.

Calfax (U.S. company)

• 616, 4-function, RPN, 6 digits red LED.
• 689, Check Book Calculator, 4-function, %, memory, red LED, Hong Kong, fits inside wallet.
• 800CD, 4-function, red LED, 9v PP3 rep. batt., Hong Kong.
• 808 S aka MICRO, scientific, red LED, 4-AAA rep. batt., Hong Kong.
• 820 CD, 4-function, red LED, 9v PP3 rep. batt., Hong Kong.
• 825P, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
• 850CD aka MICRO, 4-function, red LED, Hong Kong.
• 855P aka MICRO, 4-function, %, red LED, 4-AAA rep. batt., Hong Kong.
• 890P, listed in book. Photo.
• 895M, 4-function, %, memory, red LED, 9v, Hong Kong, similar case to 890P.
• 899S, listed in book. Photo.
• Calfax, listed in book. Photo.
• Data Brain II, listed in book. Similar to Unifive Data Brain II. Photo.

Calmaster See Tokai

CALOR

• CALOR Model number not know, 4-function, %, green VFD, 4-AA rep. batt.

Calstar

• DT-10, listed in book. Photo.
• LED80M, 4-function, %, memory, 9v PP3 rep. batt., Hong Kong, a 'Standard Type-2' calculator. Photo.

Caltek

• 830D, listed in book. Photo.

caltron

• caltron (no model number), 4-function, %, square root, memory, Hong Kong, casing resembles a 'Standard type 2' calculator.

Caltronic

• 606, listed in book, two versions with different keypads. Photo version 1, Photo version 2.
• 612, 6 digits, red LED, calculates to 12 digits, 4 function, fixed decimal point at 0 and 2 places, PP3 batt., 86x34x153mm / 3.4x6.0x1.3", Hong Kong. Photo, inside.
• 812, listed in book. Photo, inside (also found labelled Privileg 812 in a Caltronic 812 soft case - see Privileg).

CAMBRIDGE-LEE

• Executive, 4-function, %, square root, memory, blue VFD, rech. batt.  Jan. 24.

Candle

• 202, 4-function, %, memory, red LED, 9v PP3 rep. batt.
• 800N, listed in book.
• mini 801M, listed in book. Photo.
• 808E, listed in book. Photo.
• 809S, scientific functions, green VFD, 4-AA rep. batt., Korea.

Cannella

• RS-1 aka Kel-Co Class Computer, listed in book.

Canon (Japanese manufacturer. Many models include "Palmtronic" in front of the model number.)

• 8-T "Sexagesimal Calculator", has time mode, listed in book. Photo.
• F-5, listed in book.
• F-41, Scientific, VFD, 2-AA rep. batt., Japan.
• F-51, Scientific, green VFD, 4-AA, Japan. Photo.
• F-61, Scientific & Statistical, 8 digits mantissa & 2 digits exponent green fluorescent, 4-AA rep batt, 3.3x5.9", Japan. Photo.
• FC-80, listed in book.
• L812, listed in book. Photo.
• L813, listed in book. Photo.
• L1010, 4-function, %, memory, 10 digits green VFD, like a small desktop calculator. Photo.
• LD-8M2, listed in book. Photo.
• LD-8M3, listed in book. Photo.
• LD-8MS, listed in book. Photo.
• LD-8RS, listed in book.
• LD-8S, listed in book.
• LD-80, listed in book. Photo.
• LD-81, listed in book.
• LD-84M, listed in book.
• LE-10, listed in book.Photo on charger unit, inside. Featured calculator.
• LE-81M, listed in book. Photo, with battery pack, inside.
• LE-82, listed in book.
• LE-83, listed in book. Photo.
• LE-84, listed in book. Photo.
• LE-85, listed in book. Photo.
• LE-100 4 funct, 10 digit red LED, removable sealed batt pack, 3.0x5.5", Japan. Photo.
• M-8, 4-function, square root, memory, blue VFD, 2-AA rep. batt., Japan.  Jan 24.
• MD-8 aka Mult-8, listed in book. Featured calculator .
• Palmtronic 8 aka LD-84, 4-function %, square root, green VFD.
• Palmtronic 8MS, 4-function %, square root, green VFD.
• Palmtronic 8RS, 4-function %, memory, green VFD, 2-AAA rep. batt.
• Palmtronic 8 mini, listed in book.
• Palmtronic 10M, 4-function, %, square root, reciprocal, blue VFD, 2-AA rep. batt., Japan.
• Palmtronic F-7, scientific & metric conversion functions, red LED, 4-AA rep. batt. Photo .
• Palmtronic F-31, 4-function, %, square root, square, reciprocal, memory, green VFD, 2-AA rep. batt., Japan.
• Palmtronic F-71, Scientific, 8 digits mantissa & 2 digits exponent green fluorescent, 4-AA rep batt, Japan.
• Palmtronic LE-80, 4-function, red LED, 4-AA rep. batt., Japan, battery-level meter. Photo.
• Palmtronic LE-80M, 4-function, memory, red LED, 4-AA rep. batt., Japan, battery-level meter. Photo , inside.
• Palmtronic LE-80R, listed in book. Photo.
• Palmtronic LE-81, 4 funct, 8 digit green fluor, 4-AA rep batt, white color, Japan. Photo.
• Pocketronic, listed in book. Featured calculator.
• Pocketronic II, listed in book, updated Canon Pocketronic. Featured calculator .
• TP-8, 4-function, memory, sq rt., green VFD and thermal printer.

Capri

• 100, 4-function, red LED, 9v rep. batt., Mexico.

Carinco

• 47A, 4-function, %, memory, red LED, 2x AA rep. batt., fits in wallet, c1975. Photo (display not working properly), inside.
• 518, 4-function, red LED.

CARTER

• 500, 4-function, %, square root, memory, blue VFD, 2-AA rep. batt.

CARTEX

• CARTEX, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.

Casio (Japanese manufacturer)

• 8E, known from a comparison test, 8 digit red LED, 81x150mm/3.2x6", Japan, ~1973.
• 8U, listed in book. Photo.
• 101MR, listed in book. Photo.
• 101U, 4-function, 10-digits blue VFD, 5-AA rep. batt., Japan.
• 103MR, 4-function, %, memory, sq rt., 10-digits blue VFD.
• 121MR, listed in book.
• 801-MR, 4-function, %, square root, 4-AA rep. batt., Japan.
• 803MR, listed in book. Photo.
• 805MR, listed in book. Photo.
• AL-8, listed in book. Featured calculator.
• AL-8S, listed in book. Featured calculator.
• AL-10, listed in book. Featured calculator.
• AQ-810, 4-function, %, memory, sq rt., clock, yellow LCD.
• CD-813 aka Memory-8A, listed in book.
• CM-601 aka Mini, listed in book. Photo .
• CM-602 aka Mini, listed in book. Photo .
• CM-603 aka Mini, 4-function, 6 digits green VFD (single tube), 4-AA, 150x80x35 mm / 5.9x3.1x1.4", Japan. Photo, inside.
• CM-604 aka Mini, listed in book.
• CM-605 aka Mini, listed in book. Photo .
• CM-606 aka Personal Mini, see below. Photo .
• CM-607 aka Personal Mini, listed in book.
• College fx, Scientific, 2-AA rep batt, 3.25x5.6" (83 x 144 x 22 mm), Japan. Photo.
• CQ-1 aka Computer Quartz CQ-1, listed in book. Photo.
• CQ-2 aka Computer Quartz CQ-2, listed in book. Photo.
• CQ-81, 4-fuction, %, memory, sq rt., clock, yellow LCD.
• F-2, listed in book. Photo.
• fx-10, listed in book.
• fx-11, listed in book. Photo1, photo2.
• fx-15, listed in book. Photo (note half-height zero).
• fx-17, Scientific, green VFD, 4-AA rep. batt., Japan. Photo.
• fx-19, Scientific, green VFD, 4-AA rep batt, 3.5x5.9", Japan. ~1976. Photo.
• fx-20, listed in book. Photo.
• fx-21, listed in book. Photo.
• fx-31, listed in book. Photo.
• fx-39, Scientific & statistical, green fluorescent, 2-AA rep batt, 3.3x5.9", Japan. Photo .
• fx-101, scientific, 10 digits green VFD, 4-AA rep. batt., 160x95x26mm / 6.3x3.75x1.0", Japan. Photo .
• fx-102, scientific, 10 digits green VFD.
• fx-110, scientific, 10 digits green VFD, 2- AA rep. batt., 3.5x5.9", Japan. Photo.
• fx-140, scientific, 10 digits green VFD, 2- AA rep. batt., 150x80x21mm / 5.9x3.1x0.8", Japan. Photo .
• fx-201p, scientific programmable, blue VFD, 4-AA rep. batt.  Jan. 25.
• fx-360, Statistical, 10? digits blue VFD, 3-AA rep. batt., Japan.
• H-1, 4-function, %, square root, memory, 8 digits green VFD, 2-AA rep batt., 75x135x19mm / 3x5.3x0.75", Japan. Photo.
• H-801 aka Biolator, listed in book.
• H-802 aka Personal I, listed in book.
• H-810 aka Pocket Mini, listed in book.
• H-811 aka Memory-8S, listed in book.
• H-812 aka Memory-8F, listed in book.
• H-813B aka Personal-M1, listed in book.
• H-814 aka Memory A-1, listed in book.
• H-816 aka Memory B-1, listed in book.
• HL-801, 4-function, %, memory, sq rt., yellow LCD.
• HL-807, 4-function, %, memory, yellow LCD.
• J-1 aka J-811, 4-funct, %, mem, sq rt, sgn chg, 8 digit fluor display, 4.0x6.25", 2-AA rep batt, very similar to J-3, Japan. Photo.
• J-2, 4-function, %, memory, square root, 10-digits blue VFD, 2-AA rep bat, 100x158x27mm / 3.9x6.2x1.1", Japan, "Casio J-1" embossed in back of casing. Photo.
• J-3 aka J-1211, listed in book. Photo.
• J-10, 4 function, %, memory, square root, green fluorescent, 4.0x6.5", 2-AA rep batt, Japan. Photo .
• JR-110, 4-function, %, memory, change sign, printer, 10 digits green VFD, 4-AA rep. batt., 245x132x48mm / 9.6x5.2x1.9", Japan. Photo.
• LC-821, 4-function, %, memory, sq rt., yellow LCD.
• Memory-8, 4-function, memory, green VFD, 4-AA rep. batt., 143x115x30mm / 5.6x4.5x1.2", Japan. Photo .
• Memory-8A aka CD-813, 4-function, %, memory, sq rt, green VFD, 2-AA rep batt, 135x75x20mm / 5.3x2.9x0.8", Japan. Photo.
• Memory-8F aka H-812, listed in book. Photo , Photo alternative keyboard.
• Memory 8-R aka Y-811, listed in book. Photo .
• Memory 8-S aka H-811, listed in book. Photo .
• Memory 10, 4-funct, fluor, 2-AA rep batt, Japan. Photo.
• Memory 10-F, 4-funct, %, mem, sq. rt., 10-digit green VFD, 2-AA rep batt, c1976, Japan. Photo .
• Memory 10-GT, 4-funct, %, mem, sq. rt., 10-digit green VFD, 2-AA rep batt, Japan. Photo .
• Memory-81 aka H-815, 4-function, %, memory, square root, green VFD, 2-AA rep batt, Japan.
• Memory A-1 aka H-814, listed in book.
• Memory B-1 aka H-816, listed in book. Photo .
• Micro Mini, listed in book.
• Mini, listed in book. Featured calculator.
• Mini aka CM-601, listed in book. Photo .
• Mini aka CM-602, listed in book.
• Mini aka CM-603, 4-function, 6 digits green VFD (single tube), 4-AA, 150x80x35 mm / 5.9x3.1x1.4", Japan. Photo, inside.
• Mini aka CM-604, listed in book.
• Mini aka CM-605, listed in book. Photo .
• Mini-8 aka Y-800, 4-func, %, change sign, 8-dig green VFD, 148x72x24mm / 5.8x2.8x1", Japan. Photo.
• Mini Card LC-78, the first credit card sized calculator. Featured calculator . Photo.
• Mini Memory, listed in book.
• Mini-Printer, listed in book. Photo.
• Mini Root, 4-function, %, sq rt., green VFD, horizontal shape.
• MQ-1, 4-function, %, clock, 6-digits yellow LCD, 2-button cells, 112x32x11mm / 4.4x1.25x0.4"), Japan, tiny calculator with clock and protective flap over keyboard. Photo. Featured calculator.
• MQ-2, 4-function, %, clock, yellow LCD, 2-button cells, 121x36x11mm / 4.75x1.4x0.4", Japan, tiny calculator with clock and protective flap over keyboard. Photo. Featured calculator.
• Personal I aka H802, listed in book. Photo .
• Personal M-I aka H813B, listed in book. Photo .
• Personal-Mini aka CM-606, 4 functions, 6 digits green VFD. Photo.
• Personal-Mini aka CM-607, listed in book. Photo, inside.
• Personal-8M aka CD-812, 4-funct, mem, %, fluor, 3.0x5.25", 2-AA rep batt, similar case to Pocket 8, Japan.
• Pocket-8, listed in book.
• Pocket-Mini, listed in book.
• Pocket-Mini aka P810, listed in book. Photo .
• Pocket-Mini aka P811, listed in book.
• Pocket-Mini aka P812. Photo.
• Pocket-Mini aka CP801B, listed in book.
• Pocket-Mini aka CP801C, listed in book.
• PRO fx-1, scientific programmable, magnetic card read/write, blue VFD, 4-AA rep. batt., Japan.
• Root-8, listed in book. Photo.
• ST-1, calculator & stop-watch, listed in book. Photo. Featured calculator.
• Y-811 aka Memory 8-R, listed in book.

CASTELBAJAC

• PA-80, 4-funct, %, red LED, 4-N rep. batt., similar to Pico model.

CB

• CB-888, 4-funct, %, mem, sq rt, green VFD, rechargeable battery pack. Photo. Featured calculator.

CBC (CBC International Group of Companies)

• ADMINISTRATOR, 4-funct, %, red LED.
• Memory PC2972, 4-funct, %, mem, +/-, EX, 12-digits red LED, 9V rep. batt., 147x90mm, Canada, similar to the Rapid Data Rapidman 812. Photo.

CBM - See Commodore.

CEDEO

• 832MD, 4-funct, %, square root, memory, blue VFD, 2-AA rep. batt., Korea. Photo.

Century or Century Mark IV
(These calculators are reported to have been made for and exclusively distributed by Gulf Oil Mail Order.  However, the "Century Mark IV" has on the back the address of "Special Offer Headquarters 6775 West 174th St., Tinley Park, Illinois, U.S.A.", which appears to be related to the "Penny Saver" advertising newspaper.
Another example of the "Century Mark IV" is reported to have on the back "Rapid Data Systems Intern. Ltd., Havant, Hants, England, Model 535".
Also, the Century Mark IV name appears on other electronic products including radios, 8-track cartridge players, and cassette recorders.
So the company behind the name had its fingers in many pies.)

• Centurion, listed in book.
• Century Mark IV, type 1, 4-function, red LED, 9v (PP3), 80x144x22mm / 3.1x5.7x0.9". Photo .
• Century Mark IV, type 2, (aka 535), listed in book. Photo, inside, label.
• Century Mark IV, type 3, 4-function, %, red LED, 9v (PP3), similar to National Semiconductor 835A.
• Bowmar Century Mark IV (aka 90512),  listed in book. Photo.

Chason

• JE-408, listed in book.

Checkmate - See Litronix.

Check Tronic (probably not the manufacturer. Please get in touch with us if you know)

• Check Tronic, 2-funct (yes, addition and subtraction only), 6-digit red LED, calculator for bank cheque (check) account balancing, 9v rep. batt., c1975. Photo. Featured calculator .

Chinon (Japanese manufacturer, known for its cameras.  Calculators mainly seen in Europe)

• 880M, 4-functions, %, square root, square, memory, green VFD, 2-AA rep. batt., Taiwan.
• 1200, 4-functions, red LED, 4-AA rep. batt., 92x142x34mm / 3.6x5.6x1.3", c1973, HongKong, looks like a small version of the early Sanyo models. Photo, inside.
• 1800M, 4-functions, memory, red LED, 4-AA rep. batt. Photo.
• Executron 8M, 4 functions, memory, %, sq root, green VFD, 4-C rep batt, Japan.
• Executron 8M/2, 4 functions, memory, %, sq root, green VFD, 4-C rep batt, 122x213x48mm / 4.8x8.4x1.9", Japan. Photo.

Cipel

• DGT1000, 4-function, %, square root, memory, blue VFD, 2-AA rep. batt., Singapore.

Citaco (Citaco Business Machines Ltd., Grand Buildings, Trafalgar Square, London W.C.2)

• K16, version of Summit K16, obtained in Britain. Photo 1, photo2.

CI and C. Itoh (CI Business Machines and C. Itoh Business Machines.  Both "a division of C. Itoh & Co. Ltd., Tokyo, Japan.")

• 80, 4 function, %, square root, pi, green VFD, 2-AA rep. batt.
• 83M, 4 function, %, quare root, square, reciprocal, memory, green VFD, 2-AA rep. batt., Japan.
• 800, 4 function, %, green VFD, 4x AA rep batt, 87x135x30mm / 3.4x5.3x1.2", Japan. Photo.
• 801M, 4 function, %, memory, green VFD, 4-AA rep. batt., Japan.
• 803M, 4 function, %, square root, square, reciprocal, memory, green VFD, 4-AA rep. batt., Japan.  Jan. 24.
• 8000 aka Dantron 8000, 4 function, %, blue VFD, 4-AA rep. batt., Japan. Photo.
• 8001, 4 function, %, VFD, 4-AA rep. batt., Japan.
• 8005, 4 function, %, memory, sq rt, green VFD, 4-AA rep. batt., 85x137x35mm / 3.3x5.4x1.4", Japan. Photo .
• 8015, 4 function, %, memory, green VFD, 4-AA rep. batt., Japan.
• 8025, 4 function, %, square root, memory, green VFD.
• Dantron 8001, 4 function, %, green VFD, 4-AA rep. batt., 85x137x33mm / 3.3x5.4x1.3", Japan.
• Pocket 8, listed in book. Photo.
• Prismatic LC 800, 4 function, %, memory, early reflective LCD, 2- 9v rep. batt. (similar to the early Rockwell manufactured LCD models).

Citizen (Japanese manufacturer, calculators mainly seen in Europe)

• 120D, 4-function, 6-digits green VFD, 4-AA rep. batt., Japan.  Jan. 25.
• 120R, 4-function, 6-digits green VFD, 4-AA rep. batt., Japan.
• 800D, listed in book.
• 801D, 4-func, %, mem, sq rt, sq, green VFD, 4x AA rep batt, 82x137x24mm / 3.25x5.5x1", Japan.  Photo .
• 800R, listed in book.
• 800XL, listed in book. Photo.
• 810R, listed in book. Photo.
• 820R, listed in book. Photo.
• 820SR, scientific, green VFD, 4x AA rep. batt., 85x149x24mm / 3.5x6x1", Japan. Photo.
• 830FR, financial, green VFD, 4x AA rep. batt., Japan.
• 830R, 4-function, %, square root, memory, green VFD.
• 831RD 4 funct, mem, %, sq funct, recip, sgn chg, green fluor, sealed batt pack, 3.5x6.5", also had a slanted holder for sitting on a desk, Japan. Photo.
• 852SR, scientific, green VFD.
• Carry 80M, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
• Carry 90M, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
• Carry M6, listed in book. Photo.
• Carry M8, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
• Carry V4, 4-function, %, blue VFD, 2-AA rep. batt., Japan.  Jan. 24.
• SIX, 4-function, VFD.  Jan. 25.
• Eight, 4-function, %, sq. rt., green VFD, 3-AAA rep. batt., Japan.
• SR I, Scientific, 2- AA rep/rech. batt, 86x166x21mm / 3.9x6.5x0.8", Japan, c1978. Photo.
• SR II, Scientific, 2- AA rep. batt.

Clever

• 2101, 4-function, %, memory, square root, blue VFD, 1-AA rep. batt., 74x116x19mm / 2.9x4.6x0.75". Photo .

CM

• IV, 4-function, %, memory, square root, red LED, 9v rep. batt., similar to National Semiconductor 835.

CO (This series of calculators is a bit of a puzzle since this may be a part of the  model number of calculators from an unknown company.)

• CO8X, 4-function, blue VFD, 4-AA rep. batt., Japan.
• CO 12 X, 4-function, %, memory, square root, blue VFD, 4-AA rep. batt., 74x116x19mm / 2.9x4.6x0.75". Photo .

Coca Cola (The Coca Cola company)

• Cocal Cola, 4-function, %, memory, red LED, a 'Standard type 1' model.

Colex (Hong Kong company)

• 811, 4-function, %, memory, blue VFD, 4-AA rep. batt., Hong Kong.  Jan. 24.
• 811-A, listed in book.
• 812, 4 function, %, memory, square root, green VFD.
• 812-SL, 4 function, %, memory, square root, green VFD, rechargeable batteries, 78x143x18mm / 3.1x5.6x0.7", Hong Kong. Photo. Featured on British Calculator site.
• C08X, 4-function, blue VFD, 4-AA rep. batt., Japan.
• C082M, 4-function, %, memory, green VFD, 3-AA rep. batt., Korea.
• ESR, scientific, green VFD, 4-AA rep. batt., Hong Kong.
• ESR SC8, scientific, blue VFD, 4-AA rep. batt., Hong Kong.
• ESR-70, listed in book. Photo.
• FC 2000 MIDAS, financial, green VFD, 4-AA rep. batt., Hong Kong.

Collins

• 821, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong.
• 830, 4-function, %, square root, square, memory.  Jan. 24.

Columbia (Columbia Scientific, Santa Monica, California, U.S.A.)

• Columbia, listed in book. Photo.
• Columbia-2, listed in book. Photo.
• Columbia-III aka ML-8, listed in book.
• Columbia III M aka 803M, aka Memory 3, listed in book. Photo.
• Escort-2, 4-function, red LED, sealed rech. batt., U.S.A.
• MD-12M, 4-function, %, memory, 12-digits blue VFD individual tubes, 12v sealed rech. batt., "MOS/LSI and diodes manufactured in U.S.A.  Assembled in KOREA".
• Memory II, 4-function, memory, red LED, rech. batt., 76x142x26mm / 3.0x5.6x1.0", U.S.A. Photo .
• Scientific, listed in book.

Comico

• 1000, 4-function, %, memory, red LED, a 'Standard type 1' model in red rather than blue.

Commodore (CBM - Commodore Business Machines - USA company (originally from Canada) with strong UK ties)

• 5R39, scientific, 12-digits green VFD, 3-AA rech. batt., 87x165x37mm / 3.4x6.5x1.5", c1976, Japan. Photo , inside.
• 9D-31, listed in book.
• 9R-23, listed in book. Photo.
• 9R-25 4-funct, mem, %, sq funct, recip, green fluor, sealed batt, 3.0x5.5", similar to 9R-23, Japan. Photo.
• 9R-31, listed in book.
• 301, listed in book. Photo.
• 385R, listed in book. Photo.
• 774D, listed in book. Photo, inside.
• 776M, 7 digits red LED, listed in book. Featured calculator.
• 796M, listed in book. Featured calculator.
• 797 (two types), 4 function, %, memory, red LED, 9v rep batt, 2.6x6.1", Hong Kong. ~1978. Photo.
• 797D, listed in book.
• 797M, listed in book. Photo .
• 798A, listed in book.
• 784D, 4 function, red LED, 9v rep batt, 63x135x24mm / 2.5x5.3x0.9", Made in UK (circuit board made in Japan), ~1974. Photo.
• 786D version 1, 4 function, %, EX, red LED, 9v rep batt, 63x135x24mm / 2.5x5.3x0.9", Made in UK. Photo .
• 786D version 2, 4 function, %, memory, red LED, 9v rep batt, 63x135x24mm / 2.5x5.3x0.9", Made in UK (circuit board made in Japan), ~1975. Photo.
• 884D, listed in book.
• 885D, 4-funct, %, red LED, 3.0x5.75", has unusual for Commodore a "D" key to refresh the display, USA. Photo.
• 885D-2, similar to 885D but does not have the "D" and "CE" keys, 9V PP3 rep batt., USA.
• 886D, listed in book. Photo, inside.
• 887D, listed in book. Photo.
• 897D, listed in book. Photo.
• 899A, listed in book. Photo.
• 899D, listed in book.
• 979D aka GL979D, listed in book. Photo .
• 986R aka GL986R, listed in book.
• 987R aka GL987R, listed in book.
• 989R aka GL989R, listed in book. Photo .
• 996R aka GL996R, listed in book. Photo , inside.
• 997R aka GL997R, listed in book. Photo , inside.
• 997RF aka GL997RF, listed in book. Photo .
• 1489, 4-function, %, square root, square, reciprocal, memory, red LED, sealed rech. batt., U.S.A.
• 3101 'MAVERICK', 4-function, red LED, sealed rech. batt., 'Made in California', 'Minuteman' style with 'denim' design around keyboard and display.
• 4109, 4-function, %, memory, sq rt., square, red LED, rech. batt., U.S.A.
• 4902 aka F4902, listed in book.
• 7923, listed in book. Photo.
• C12M, 4 function , %, memory, sq rt, 12-digits green VFD, 4xC rep batt, 180x240x62mm / 7x9.5x2.5", c1978, Taiwan. Photo.
• C110, listed in book. Featured calculator.
• F4146R, listed in book. Photo.
• F4902, listed in book. Photo.
• GL-96D, 4 function, %, green VFD.
• GL-97D, 4 function, %, memory, square, reciprocal, 7 digits green fluorescent, 3x5.5", Japan. Photo .
• GL-976M, 4 function, %, memory, 7 digits green fluorescent, 3-AA rechargeable, 3.0x5.5", ~1975. Marked GL 976M on calculator, GL 976MR on instruction leaflet. Photo.
• LC5K3, 4-function, %, memory, sq rt., yellow LCD, slimline.
• LC43SR, scientific, yellow LCD, button cells, slimline. Photo1, photo2.
• M55, listed in book.
• MM1 aka Minuteman MM1, listed in book. Photo .
• MM2 aka Minuteman MM2, listed in book. Photo, inside.
• MM2PM aka Minuteman MM2PM, listed in book. Photo.
• MM2SR aka Minuteman MM2SR, listed in book. Photo, inside.
• MM3 aka Minuteman MM3, 4-N rep. batt., listed in book. Photo.
• MM3B aka Minuteman MM3B, listed in book.
• MM3M aka Minuteman MM3M, listed in book. Photo.
• MM3MT aka Minuteman MM3MT, listed in book. Photo.
• MM3 Metric, 4-function, memory, metric conversion, red LED, 4-AA rech. batt., 75mmx104mmx27mm / 3.0x4.1x1.1", England, c1974, similar to Commodore Control Metric Computer. Photo, inside.
• MM3PM aka Minuteman MM3PM, listed in book.
• MM3PR aka Minuteman MM3PR, listed in book.
• MM3R aka Minuteman MM3R, listed in book.
• MM3S aka Minuteman MM3S, listed in book. Photo.
• MM6 aka Minuteman MM6, listed in book. Photo.
• N60 aka Navigator, listed in book. Featured calculator.
• P50, listed in book. Photo.
• PR 100 (two types). Details as in the Book. Both made in England. Photo.
• S61 aka Statistician, listed in book. Featured calculator .
• SR-017, scientific, 8 digits mantissa & 2 digits exponent, green VFD, 3-AA batt.
• SR36, scientific, 10 digits mantissa & 2 digits exponent, red LED, 4-AA rech batt., 79x149x33mm / 3.1x5.9x1.3", 1974, UK. Photo.
• SR37, limited scientific, red LED, UK.
• SR1400 aka Electronic Slide Rule, listed in book.
• SR1800, listed in book. Photo, inside.
• SR4120D, listed in book.
• SR4146R, listed in book.
• SR4148R, listed in book, two varieties of keys. Photo.
• SR4190R, listed in book. Photo.
• SR4912, scientific, red LED, 9v rep batt, 3.2x6.0", Hong Kong. ~1979. Photo, version with alternative key colour.
• SR4921, scientific, red LED, RPN.
• SR5190R, listed in book.
• SR6120R, listed in book.
• SR6140R, listed in book.
• SR7919, listed in book. Photo.
• SR7949, scientific, 5 digits mantissa & 2 digits exponent red LED, PP3 rep. batt., 64x137x24mm / 2.5x5.4x0.9", c1976, United Kingdom. Photo, inside.
• SR8120, scientific, 8-digits mantissa & 2-digits exponent red LED, 9v rep batt., 76x146x25mm / 3.0x5.75x1.0", U.S.A. & England. Photo.
• SR9190R, listed in book. Photo.
• US3, listed in book.
• US4, listed in book. Photo.
• X-24, 4-function, %, memory, sq rt., 8-digits green VFD, 2-AAA rech batt., Japan. Photo.

Compex (Cal-Comp Electronics, Inc.)

• 802MD, 4-function, %, memory, blue VFD, 1-AA rep. batt. Photo.
• AK-10, listed in book. Photo.
• EC-1000W, listed in book.
• SR-10, listed in book.
• SR-40, 8-digits green VFD.
• SR-55, Scientific, green fluorescent, 3-AA rep batt, 3.1x5.8", country of manufacture unknown. Photo .
• ST-10 SUPER THIN, 4-function, %, square root, memory, green VFD, sealed rech. batt.

Compuad (Australian company - Compuad Australia Sales)

• H8C, 4-function, %, VFD, 4-AA rep batt, 86x145x27mm / 3.4x5.7x1.1". Photo.
• SSR-2, Scientific, 8-digits mantissa & 2-digits exponent green VFD, 4-AA rep batt, 85x150x29mm / 3.3x5.9x1.1", Taiwan. Photo.

Compuchron

• Calculator Watch, listed in book. Featured calculator.

Compucorp (U.S. Company. These machines were sold under the Compucorp name and were also supplied to Monroe, Sumlock, IME, Ricoh, ATAIO, and others, and labelled for them.)

• 320-G aka Scientist, listed in book. Photo (labelled for the British Sumlock-Anita company).
• 322-G aka Scientist, listed in book. Photo (labelled for the Italian IME company).
• 324-G, listed in book. Featured calculator.
• 326, listed in book.
• 340 aka Statistician, listed in book. Photo .
• 344 aka Statistician, similar to 340.
• 354 aka Surveyor, surveying functions, programmable, 12 digits amber 'Panaplex II' gas discharge, 4x D size rechargeable batteries, similar to other models in this series.
• 360 aka Bond Trader, listed in book.

Compumatic ( P.O. Box 3263, Huntsville, Alabama 35810, U.S.A.)

• 8-A, 4-functions using RPN, red LED, 5-AA rech. batt., 82x146x39mm / 3.2x5.75x1.5", U.S.A., c1972. Photo .

COMPU-TECH (COMPU-TECH PRODUCTS LTD., NEW YORK, N.Y.)

• VIII, 4-function, %, memory, red LED, 9v PP3 rep. batt., U.S.A.

Computech

• M-801, listed in book. Photo.

Computer

• 3000, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.

Computex

• Computex, 4-function, red LED, Japan.
• Computex MARK-V, 4-function, green VFD, 4-C rep. batt., Japan, similar to apf Mk V.

Comus (Comus Inc., Grand Rapids, Michigan, U.S.A.)

• C-6 Diet Computer, 4-function, diet calculations, red LED, 9v PP3 rep. batt., 72x141x24mm / 2.8x5.6x0.9", 1979, Taiwan. Photo, in Diet mode.

Concept (Zayre Corporation, U.S.A.  See also Texas Instruments Concept models)

• 10, 4-function, red LED, similar to National Semiconducto Novus 750.
• 24 type 1, listed in book. Photo.
• 24 type 2, 4-function, %, square root, memory, blue VFD, 4-AA rep. batt., Japan.
• 24 type 3, 4-function, %, square root, memory, blue VFD, 2-AA rep. batt., Hong Kong.
• Compact, listed in book. Photo.
• V, 4-function, %, mem, red LED, 9v (PP3) rep. batt., Malaysia. Photo.
• VI, 4-function, %, mem, red LED, a "standard type 2" version.

Concept 2000

• MICKEY MOUSE CALCULATOR aka 4670, 4-function, red LED, 9v PP3 rep. batt., Hong Kong, has picture of Mickey Mouse.
• MR. MUS-I-CAL aka 560, "Math Teaching Device, Calculator and Musical Instrument", in calculator mode 4-function, 6-digits red LED, 9v PP3 rep. batt., Hong Kong.

concorde

• 880, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 2' calculator.
• M3000, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator. Photo.

Condata

• 2000-1, 4-function, red LED, 5-AA rep. batt., Spain.
• 2000-4, 4-function, %, red LED, Spain.
• 2000-6, 4-function, %, square, reciprocal, memory, red LED.  Jan. 24.
• 2000-7, 4-function, %, green VFD.
• 2000-9, 4-function, %, square root, green VFD.
• 5001, 4-function, %, green VFD.

Conic

• No model number, 4-function, memory, square root, reciprocal, blue VFD, 3-AA rep. batt., 72x128x25mm / 2.8x5.0x1.0". Photo.
• 650, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
• 750, listed in book.
• 960-L, 4-function, %, memory, red LED, 3-AA rep. batt., Hong Kong.
• 980 aka 980-F, scientific, blue VFD, 3-AA rep. batt., Hong Kong.  Jan. 24.
• 980-L, scientific, red LED.
• EL-601, 4-function, %, memory, red LED, 9v PP3 rep. bat, Hong Kong.

Continental

• 350, 4-functions, %, red LED, 9v PP3 rep. batt.
• 1800A, 4-functions, %, red LED, PP3 rep. batt., 70x112x21mm / 2.75x4.4x0.8", c1976. Photo , inside.
• Continental, 4-functions, %, red LED, 2-AA rep. batt., 57x113x19mm / 2.2x4.4x0.75". Photo.
• Executive 674, 4-functions, %, red LED, 4-N rep. batt.

Control Metric (Please get in touch with us if you have any information about Control Metric).

• Control Metric Computer, 4-function, memory, metric conversion, red LED, 4-AA rech. batt., 75mmx104mmx27mm / 3.0x4.1x1.1", U.S.A, c1974, similiar to Commodore MM3 Metric. Photo, inside.

Controller (Electronic Resources Ltd., Hong Kong)

• 8, 4-function, red LED, 5- AA rep. batt., 82x150x35mm / 3.2x5.9x1.4", Hong Kong. Photo.
• 8P, 4-function, %, red LED, 3-AA rep. batt., 75x140x20mm / 3.0x5.5x0.8". Photo.

Co-op (British consumer co-operative)

• 801M, 4-function, %, memory, green VFD, 2- AA rep. batt., 74x124x31mm / 2.9x4.9x1.2", Japan.  Photo .  Featured on British Calculator site.

Coronet

• SR-14, 4-function, %, square root, memory, 2-AA rep. batt.  Jan. 24.

CORRECT

• mini 1200PL, 4-function, 6-digits blue VFD, 4-AA rep. batt., Japan.

Corvus (U.S. company)

• 310, 4-function, square root, red LED. Photo.
• 311, 4-function, %, square root, red LED.
• 312, listed in book. Photo.
• 322, listed in book.
• 400, listed in book. Photo.
• 406, similar to 400.
• 411, listed in book.
• 415, listed in book.
• 500, listed in book. Photo.
• 600, financial functions, red LED. Photo.
• 615, 4-function, %, square root, red LED. Photo.
• 625, listed in book. Photo.
• 804, 4-function, %, square root, memory, green VFD, 9v PP3 rep. batt., Hong Kong.
• Checkmaster, listed in book. Photo. Featured calculator.

Coteco (nothing known about this company. If you have any information please get in touch)

• 888, 4 function, red LED, 5-AA rep. batt., 87x146x34mm / 3.4x5.75x1.3". Photo.

Craig (U.S. company)

• 4501, listed in book. Featured calculator.
• 4501A, listed in book.
• 4502, listed in book.
• 4503, listed in book.
• 4504, listed in book. Photo.
• 4505, listed in book.
• 4506, listed in book.
• 4507, listed in book. Photo casing 1, Photo casing 2.
• 4508, listed in book.
• 4509, listed in book.
• 4509B, listed in book.
• 4511, listed in book.
• 4511A, listed in book. Photo.
• 4512 'Engineering Calculator', listed in book. Photo.
• 4512A, listed in book.
• 4513, listed in book. Photo.
• 4514, listed in book.
• 4515, listed in book.
• 4516, listed in book. Photo.
• 4517, listed in book. Photo.
• 4518, listed in book.
• 4519, listed in book. Photo.
• 4520, scientific, green VFD, 2-AA.
• 4521, listed in book.
• 4522, listed in book.
• 4523, listed in book. Photo.
• 4524, 4-function, %, square root, memory, green VFD, Japan.  Jan. 24.
• M100 aka Translator, listed in book.

Cristalonic (AVIATRONIX GMBH, Munich, Germany)

• 2000, 4-function, %, memory, red LED, uses rechargeable battery packs, 145x55x10mm /  5.7x2.2x0.4", Germany, very thin.

Crown Radio

• CL-130, listed in book. Photo.

Cybernet

• 6PD, listed in book. Photo.

Cybio (nothing known about this company. If you have any information please get in touch)

• 004m, 4-functions, %, memory, square root, red LED, rechargeable battery pack that plugs straight into 230v AC supply, 56x103x15mm / 2.2x4.1x0.6", c1976. Featured calculator.

 

 

D

DADS (DADS Root Beer, U.S.A.  A soft drink.)

• DADS, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.

Daltone (Dalamal Electronics Corp., 107 Franklin Street, New York, N.Y. 10113 - U.S. manufacturer.)

• 80 (aka Pocket 80), listed in book. Photo.
• 888 SRM, 4-function, %, square, square root, reciprocal, red LED, sealed rech. batt., "Manufactured and Serviced By AMERICAN CIRCUITRON INC., Hamden, Conn."
• Opti-Cal 1, listed in book. Photo.
• Pocket 8, 4-function, red LED, 9v PP3 rep. batt., 65x117x27mm / 2.6x4.6x1.1", U.S.A. Photo .
• Pocket 80, 4-function, %, red LED, 9v PP3 rep. batt.

Dantron

• See C.Itoh

Datacal ("Distributed by V.I.P. programs company, Westbury, N.Y., U.S.A.")

• 250 DC, 4-function, red LED, Hong Kong.
• II, 4-function, %, red LED, similar to Corvus 400.

Dataking

• EC-868, 4-function, %, memory, red LED, 5-AA rep. batt.
• EC-878, 4-function, %, memory, red LED, 4-AA rep. batt.
• LC-800, listed in book. Early reflective LCD (1973-74) model made by Rockwell, unusually powered by two PP3 9v batteries. Photo.

DEC Engineering Corp. (Korean company)

• DE-803B "Loyalmate", 4 function, green VFD in separate tubes, 4-AA rep. batt., 90x160x35mm / 3.5x6.3x1.4", Japan, c1973. Photo, inside.

Decimo (English company.  Also supplied the W.H. Smith store chain with Strand calculators.)

• 2001-e "electronic slide rule extraordinary", scientific, 10 digits mantissa, 2 digits exponent red LED, 72x148x20mm / 2.8x5.8x0.8", Hong Kong. Photo. Featured on British calculator site.
• Da Vinci, listed in book. Photo. Featured on British calculator site.
• Handy, 4 function, %, red LED. Photo. Featured on British calculator site.
• Handy M, 4 function, %, memory, red LED. Featured on British calculator site. Photo.
• International - type 1, 4 function, 6 digits green VFD, 4-AA rep. batt., 82x137x25mm / 3.2x5.4x1.0". Photo. Featured on British calculator site.
• International -type 2 (aka International Slimline and model 173A ), 4 function, %, memory, red LED, 4-N rep. batt., 69x150x17mm / 2.7x5.9x0.7". Photo. Featured on British calculator site.
• Memory Man, 4 function, %, memory, green VFD, 4x AA rep batt, 90x149x32mm / 3.5x5.9x1.25", Japan. Photo . Featured on British calculator site.
• Memory Man II, 4 function, %, memory, red LED, 9v rep batt, 2.9x5.3", Taiwan. Photo. Featured on British calculator site.
• Ready Reckoner (aka 674), 4-function, %, red LED, 4x N rep batt, 69x149x17mm / 2.7"x5.9"x0.7". Photo. Featured on British calculator site.
• Scientific, same as Vatman Scientific.
• Strand, 4-function, %, green VFD. Photo. Featured on British calculator site.  Also version labelled for W.H. Smith.
• Strand Memory, 4-function, %, square root, memory, green VFD. Photo. Featured on British calculator site.  Also version labelled for W.H. Smith.
• Super Vatman (version 1), 4 funct, %, sq rt, exchange sign, mem, 8 digit fluor, 4-AA rep batt, 3.0x5.25", Japan. Photo  Featured on British calculator site.
• Super Vatman (version 2), 4 funct, VAT %, sq rt, mem, 8 digit fluor, 4-AA rep batt, 3.0x5.25", Japan. Photo  Featured on British calculator site.
• Super Vatman II, 4 funct, %, sq rt, sgn chg, mem, 8 digit fluor, 4-AA rep batt, 3.0x5.25", Japan. Photo  Featured on British calculator site.
• Super Vatman M, listed in book. Photo. Featured on British calculator site.
• Super Vatman SS I, 4 function, memory, square root, square, green fluorescent, 9v rep batt, 83x130x38mm / 3.3x5.2x1.5", Japan, Photo . Featured on British calculator site.
• Super Vatman SS II, 4 function, VAT %, memory, square root, green fluorescent, 9v rep batt, 83x130x38mm / 3.3x5.2x1.5", Japan, ~1976. Photo . Featured on British calculator site.
• Super Vatman V.Sc. I, Scientific, green fluorescent in single tube, AA rep batts, Japan, ~1976, not to be confused with the Vatman V.Sc. I. Photo. Featured on British calculator site.
• Vatman, listed in book, but there are several variations - see Featured on British calculator site.
• Vatman Boss aka Vatman Memory, 4 function, %, memory, 7 digits, green fluorescent, 4-C rep batt, 4.4"x7.5"x1.75", Japan. Vatman Boss version labelled on the back "Kingspoint Corporation Model 9202", and Vatman Memory version labelled on the back "Realtone Electronics Model 9202". Photo . Featured on British calculator site.
• Vatman Executive, Type 1 (red LED version), 4 function, %, 3v (2-AA rep. batt.), 76x126x19mm/3.0x5.0x0.75", c1974. Featured on British calculator site.
• Vatman Executive, Type 2 (green VFD version), listed in book. Featured on British calculator site.
• Vatman Extra, 4-function, pi, square root, green VFD, 2-AA rep. batt., Japan.
• Vatman Extra M, 4-function, memory, square root, green VFD, 2-AA rep. batt., 81x126x22mm / 3.2x5.0x0.9", Japan. Featured on British calculator site.
• Vatman Extra S, 4-function, memory, square root, square, reciprocal, green VFD, 2-AA rep. batt., 81x126x22mm / 3.2x5.0x0.9", Japan. Featured on British calculator site.
• Vatman Memory 4 funct, mem, %, sq rt, sgn chg, 8 digit green fluor, 4-AA rep batt, 3.2x5.2", Japan. Featured on British calculator site.
• Vatman Mini.  Featured on British calculator site.
• Vatman Mini II, 4 function, %, 1- AA rep batt, 2.6x3.9". Photo. Featured on British calculator site.
• Vatman Mini M. Featured on British calculator site.
• Vatman Mini M II. Featured on British calculator site.
• Vatman Mini Office, 4 function, %, memory, 10 digits green fluorescent, 2- D rep batt, 145x150x48mm / 5.7x5.9x1.9", Japan, ~1977.  Photo.
• Vatman Mini Office II, 4 function, %, memory, 10 digits green fluorescent, 2- D rep batt, 5.9x6.5", country of manufacture unknown, ~1979.  Photo.
• Vatman Popular, 4 function, %, square root, green fluorescent, 4-AA rep batt, 3.3x5.2", Japan, ~1975. Photo. Featured on British calculator site.
• Vatman Scientific, Scientific functions, green VFD, 2-AA rep. batt., 82x158x28 mm / 3.25"x6.25"x1.1". Photo. Featured on British calculator site.
• Vatman Spy, 4 function, %, 8-digit red LED, 62x98x21mm / 2.4x3.9x0.8". Photo. Featured on British calculator site.
• Vatman Student, scientific, green VFD, 76x136x19mm. / 3.0x5.4x0.75". Photo. Featured on British calculator site.
• Vatman Super Spy, 4 function, %, memory, square root, square, reciprocal, 8-digit red LED, 62x98x21mm / 2.4x3.9x0.8", ~1975. Photo. Featured on British calculator site.
• Vatman V.Sc. I, limited scientific, not to be confused with the Super Vatman V.Sc. I. Featured on British calculator site.
• Vatman V.Sc. II, limited scientific, green fluorescent, 4-AA rep batt, 83x130x28 / 3.25x5.2x1.1", Japan. Photo. Featured on British calculator site.
• Vatman Vantage, listed in book.
• Vatman X, 4 function, %, EX, green fluorescent, 4- AA rep batt, 3.3x5.2", Japan. Photo. Featured on British calculator site.

Deetee

• ECL-81, 4-function, green VFD tubes, 4-AA rep. batt., 86x48x33mm / 3.4x1.9x1.3", Japan, similar to Xonex Executive. Photo.

DELTEK

• DELTEK (may not be the model), 4-function, %, green VFD.

Demicom

• MK-II aka 800-X, 4-function, %, red LED, 4-AA rep. batt., Japan, has some similarities to the demitronics 800-X below.

demitronics (demitronics, inc., Japan)

• 800-X, 4-function, red LED, 4-AA rep. batt., Japan, has some similarities to the Demicom MK-II above. Photo.

Descom

• See RIZ.

Detron (Dae Han Electronics Ltd., Seoul, Korea. Marketed in Europe)

• 805MD, listed in book. Photo.
• 807MD, 4-function, %, square root, square, reciprocal, memory, blue VFD, 2-AA rep. batt., Korea.
• 830 MD, 4 funct, mem, %, sq rt, 8 digit VFD, 1-AA rep batt, 3.0x4.75", similar case to Caltek 830D, has "HTH" on nameplate on front, Korea.
• 842D, 4 funct, 8 digit blue VFD, 2-AA rep batt, IC GI CF583, c1976, Korea. Photo, inside.

Detson (Company appears to have been related to Lloyds and Lloytron.  This brand seen in Europe.)

• 121, 4-function, %, square root, memory, green VFD, 3-AA rep. batt.
• 505, 4 function, %, memory, square root, square, green fluorescent, 2-AA rep batt, 76x151x20mm / 3.0x5.9x0.8", Japan. Photo.
• 808, 4-function, %, memory, red LED, 9v PP3 rep. batt.
• E341 (aka Mini), 4-function, %, memory, VFD, 3-AA rep. batt., Japan.
• E406, listed in book. Photo.
• E408, 4 function, %, square root, green fluorescent, 4-AA rep batt, 3.4x5.6", Japan. Photo.
• E420, listed in book.
• E427, 4 function, %, memory, square root, green fluorescent, 4-AA, 3.4x5.6", Japan. Photo.
• E501, 4 function, %, memory, green fluorescent, PP3, 3.4x5.6", Taiwan, operating manual is marked "Lloyd's 501". Photo.

DEV-TRONICS (DEV-TRONICS, INC., Twin Falls, Idaho)

• SI-36, scientific, red LED, 3-AA rep. batt., USA.

Diamond

• MINI-8 aka LE-8-7, 4-function, %, red LED, 9V rep. batt., Japan, similar to Prinz LE-808P.

Diamant

• 3, 4-function, %, square root, green VFD, 4-AA rep. batt., Japan.  Jan. 25.
• 120, 4-function, 6-digits green VFD, 4-AA rep. batt., Japan. Photo.
• 800M, 4-function, %, memory, green VFD, 4-AA rep. batt.
• memory 3, 4-function, %, square root, square, reciprocal, memory, green VFD, 2-AA rep. batt.

Dictaphone (U.S. company)

• 1680, listed in book. Photo.
• 1681, listed in book.

Dietzgen

• CD-1, 4-function, green VFD separate tubes, rep. batt.

Digicomp (CPA Digicomp Inc., Chatsworth, California, U.S.A. An Esmond Industries company)

• Metricmaster aka M5 Memory & 5M73C, 4-func, %, metric conversion, 8-dig red LED, 4x AA rech batt, 88x182x41mm / 3.5x7.2x1.6", c1973, U.S.A., has flip-up lid. Photo.

Digical

• Mark V, listed in book.

Digi-matic (See Sears)

DIGIT

• K-80M, 4-function, amber gas-discharge, battery-level meter, similar to TEAL K-80M.

digita

• VV49, 4-function, %, square root, memory, blue VFD.

Digita-Victor

• VIC-52, listed in book.

Digitrex

• 12, 4-function, 12-digits red LED, supplied with 2 battery packs-the smaller pack takes 4-N rep. batt. and the larger pack takes 4-AA rep. batt., Japan.
• MCK-8, listed in book.

Digitron

• DIGITRON, 4-function, %, red LED, similar to Edmund Scientific 1945.
• db 800, 4-function, red LED, sealed rechargeable batteries, Yugoslavia, early boxy model with 'Klixon' keyboard.
• db 802, 4-function, square root, red LED, Yugoslavia.
• db 803, 4-function, %, red LED, Yugoslavia.
• db 806, 4-function, %, square root, reciprocal, green VFD, Yugoslavia.
• db 811 sr 11, scientific, red LED, sealed rechargeable batteries, Yugoslavia.
• db 812, 4-function, %, square root, memory, green VFD, sealed rechargeable batteries, Yugoslavia.
• db 813, 4-function, memory, red LED, 4-AA rep. batt.
• db 1000, 4-function, %, red LED, 4-button cells, very thin.
• db 1010 sc 12, scientific, at least 10-digit red LED, 4-AA rep. batt., Yugoslavia.

dir

• TP 708, 4-function, %, red LED, 5-AA rep. batt., W. Germany.  Jan. 25.

dismac (Brazilian company. Some calculators may have been assembled in the Manaus Free Trade Zone)

• hf 37 (type 1), scientific, red LED, similar to Memory Devices MEMORY ESR-817.  Photo .
• HF 37 (type 2), scientific, 8-digits mantissa & 2-digits exponent red LED, 9v PP3 rep. batt., similar to Commodore SR4912.
• HF 38, scientific, blue VFD.
• MINI MICRON M, 4-function, memory, similar to Commodore Minuteman calculators.

DIPLOMAT

• RS 1000, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.

Dittel (dittel GMBH, Landsberg, Germany)

• dir TMP 608, 4-function, %, memory, red LED, 4-AA rep. batt.
• dir TM 708, 4-function, memory, red LED, 5-AA rep. batt.
• GMF 608, scientific, red LED, 3-AA rep. batt.
• TP 708, 4-function, %, red LED, 5-AA rep. batt., Germany.
• TW708, 4-function, square, square root, red LED, 5-AA rep. batt., Germany.
• W200, 4-function, red LED, W. Germany.

Dixons (See Prinztronic)

DOOR

• D-840, 4-function, %, square root, reciprocal, red LED, 3-AA rep. batt.

dsc

• CAL-0041, 4-function, %, memory, red LED, 9v rep batt, 3.0x5.3", Hong Kong. Featured calculator.

DUGENA ("DUGENA UHREN UND SCHMUK EG, Darmstadt W. Germany" [DUGENA Clock and Jewellery company].)

• QUARTZ COMPUTER, 4-function, time, stop watch, alarm, green VFD, 1-AA rep. batt. & 2-button cells, similar to Casio CQ-1.

DULIX

• K-80M, 4-function, amber gas-discharge in separate tubes, 3-AA rep. batt., similar to JTA 8P.

Dynson (Spanish manufacturer)

• F-81, red LED, 4 funct, Spain. Photo.
• F-85, red LED, 4 funct, %, 3-AA rep batt, 3.0x5.5", Spain. Photo.

 

 

Click to go to :
Calculator Book Addendum A-B
Calculator Book Addendum E-I
Calculator Book Addendum J-O
Calculator Book Addendum P-R
Calculator Book Addendum S
Calculator Book Addendum T-Z

 

Key to Abbreviations

Functions:
4-funct = 4 basic mathematical functions (addition, subtraction, multiplication, division)
sci-funct = scientific or engineering functions (logarithmic and trigonometric functions such as log, sine, and cosine and usually memory, square, pi, etc.)
mem = memory
% = percent function
exp = exponent
paren = parentheses
pi = pi value
recip = reciprocal
sgn chg = sign change
sq rt = square root
sq funct = square functions (including square and square root)

Battery Type:
button rep batt = very small, disk-shaped, replaceable batteries commonly termed button-types, used mainly in LCD models.
rep batt = replaceable batteries (such as 9V, AA, C, and N batteries)
rep batt pack = replaceable batteries in a removable pack
sealed batt = rechargeable batteries sealed in the case
sealed batt pack = rechargeable batteries in a removable pack

Display Type:
See the section on Calculator Displays for more detailed information.
Displays have 8 digits unless specified otherwise.

COS-LCD = Early Liquid Crystal Display from Sharp showing silver digits on a dark background. COS stands for Crystal on Substrate. This display was used as early as October 1973 but eventually was phased out.
fluor = see VFD.
Gas discharge = Display containing all digits sealed in a single package employing  gas discharge to generate light in the same way as a neon lamp. Normally give amber- or orange-colored digits, and typified by the Panaplex® used by a few calculator manufacturers.
LCD = Liquid Crystal Display, a flat, gray-digit type of display type that uses less power and was embraced by calculator makers by the end of the 1970s. Early versions (used in the early 1970s) by Rockwell and Sharp are included in this guide.
LED = Light Emitting Diode display (usually red although sometimes a purple filter was used to color the display). LEDs often have small half bubble-like covers over the digits. tube or mini-tube = separate vacuum or fluorescent tube for each digit of display.
Yellow LCD = Early LCDs had a reliability problem with ultra-violet light and manufacturers used a yellow-colored filter over the normally gray display to remedy that. Refinements in later LCD designs removed the need for the filter.
VFD = Vacuum Fluorescent Display. Display containing all digits sealed in a single tube generating light from an electrical discharge onto a fluorescent material. The color of the digits is normally green or blue, or somewhere in between.

Other Information:
Klixon keypad = Texas Instruments Klixon® keypad was one of the earliest keypads and used greatly by Bowmar and a few other early calculator makers. It had the four basic functions and used metal key pads about 1/2" square.
Japan (for example) = country of manufacture as stated on calculator
RPN = Reverse Polish Notation, a method of calculating and user data entry used by HP calculators. A few other manufacturers also used RPN in more limited scale.
"aka" (also known as) is used when there is another name or model variation on the calculator.
"c" (for example, c1973) is used as "circa," denoting at approximately that time.

 

A big thanks to Thomas Brockmeier, Richard Brooks, Andrew Davie, Larry Gilbert, Niels Grot, Palmer Hanson, Steve Haynes, Robert King, Kent King, Jeff Lane, Philippe Leckler, Ken Meine, Bob Patton, James Redin, and CB Wilson for their help.

 

How to Buy the Book!!!!

Collector's Guide to Pocket Calculators

by Guy Ball and Bruce Flamm

This 204 page, softcover book is the world's most comprehensive listing of electronic pocket calculators from the 1970's, the so-called Golden Age of Pocket Calculators.  Over 1,500 known calculators are detailed with information on features, size, display type, power type, and pricing.  In addition, when known, the listing also contains date of sales, original pricing, and country of origin information.

The book features over 470 photographs of various models from over 240 manufacturers around the world (including calculators from lesser-known companies in England, Switzerland, Netherlands, Spain, Germany, Bulgaria, and Russia).

"The Collector's Guide to Pocket Calculators" includes a comprehensive value guide to help you gauge rarity and desirability of the various models -- especially as they relate to each other.

The book can be purchased for $20.00 plus $5 for USA mailing ($10 for first class mailing to Canada, and $23 to other countries).  California residents please add $1.86 state sales tax.

For payment by PayPal, or for additional details and information, contact co-author Guy Ball.  Guy is happy to sign the books if asked.

 

Copyright ©1997 Guy Ball and Bruce Flamm, ©2002-2025 Nigel Tout

Vintage Calculators

Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2025.