Home > Calculator Photo Library

The Collector's Guide to Pocket Calculators lists over 1,500 models of early pocket calculators from over 220 companies.

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

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 British Calculator . Feb. 08.
• 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 British Calculator. Feb. 07.

Calconsa

• Electronic Calculator, 4-function, separate VFD tubes, Japan. Jan. 07.

Calcucounter

• Calcucounter, 4-function, %, memory, timer, extra large red LED. Jan. 07.

Calculated Industries

• Loan Arranger II, listed in book.

Calcumatic (U.S.)

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

Calfax (U.S. company)

• 616, 4-function, RPN, 6 digits red LED. Jan. 07.
• 820 CD, 4-function, red LED, 9v.
• 890P, listed in book. Photo.
• 895M, 4-function, %, memory, red LED, 9v, Hong Kong, similar case to 890P.
• 899S, listed in book.
• Calfax, listed in book.
• Data Brain II, listed in book. Photo.

Calmaster (European market calculator)

• M-801 4 funct, red LED, 4-N rep batt, 2.1x3.2", same case as Computech M-801, Japan.

Calstar

• DT-10, listed in book.

Caltek

• 830D, listed in book.

Caltronic

• 606, listed in book. Photo, inside.
• 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).

Candle

• 202, 4-function, %, memory, red LED, 9v PP3 rep. batt. Jan 07.
• 800N, listed in book.
• 801M, listed in book.
• 808E, listed in book.

Cannella

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

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

• Palmtronic 8 mini, listed in book.
• 8-T "Sexagesimal Calculator", has time mode, listed in book. Photo.
• F-5, listed in book.
• F-7 (aka Palmtronic F-7), scientific, red LED.
• F-51, Scientific, green fluorescent, 4-AA, Japan. Photo.
• FC-80, listed in book.
• Palmtronic F-61, Scientific & Statistical, 8 digits mantissa & 2 digits exponent green fluorescent, 4-AA rep batt, 3.3x5.9", Japan. Photo.
• L812, listed in book.
• L813, listed in book. Photo.
• L1010, 4-function, %, memory, 10 digits green VFD, like a small desktop calculator. Photo.
• LD-8M2, listed in book.
• LD-8M3, listed in book. Photo.
• LD-8MS, listed in book.
• LD-8RS, listed in book.
• LD-8S, listed in book.
• LD-80, listed in book.
• LD-81, listed in book.
• LD-84 (aka Palmtronic 8), listed in book.
• LD-84M, listed in book.
• LE-10, listed in book.Photo on charger unit, inside. Featured calculator.
• LE-80, similar to LE80R but without memory. Photo.
• LE-80M, similar to LE80R. Photo, inside.
• LE-80R, listed in book.
• LE-81 aka Palmtronic LE-81, 4 funct, 8 digit green fluor, 4-AA rep batt, white color, Japan. Photo.
• LE-81M, listed in book.
• LE-82, listed in book.
• LE-83, listed in book.
• LE-84, listed in book.
• LE-85, listed in book.
• LE-100 4 funct, 10 digit red LED, removable sealed batt pack, 3.0x5.5", Japan. Photo.
• MD-8 aka Mult-8, listed in book. Featured calculator.
• Pocketronic, listed in book. Featured calculator.
• Pocketronic 2, listed in book.
• TP-8, 4-function, memory, sq rt., green VFD and thermal printer.

Capri

• 100, 4-func, red LED, 9v rep. batt. Jan 07.

Carinco

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

Casio (Japanese manufacturer)

• 8E, known from a comparison test, 8 digit red LED, 81x150mm/3.2x6", Japan, ~1973.
• 8U, listed in book.
• 101MR, listed in book.
• 101U, 4-function.
• 103MR, 4-function, %, memory, sq rt., 10-digits blue VFD.
• 121MR, listed in book.
• 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.
• 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-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-19, Scientific, green fluorescent, 4-AA rep batt, 3.5x5.9", Japan. ~1976. Photo.
• fx-20, listed in book. Photo.
• fx-21, listed in book.
• 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 fluorescent, 2- AA rep batt, 3.5x5.9", Japan. Photo.
• 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.
• J3 aka J-1211, listed in book.
• J-10, 4 function, %, memory, square root, green fluorescent, 4.0x6.5", 2-AA rep batt, Japan. Photo.
• LC-821, 4-function, %, memory, sq rt., yellow LCD.
• 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.
• Memory 8-R aka Y-811, listed in book.
• Memory 8-S aka H-811, listed in book.
• 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 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.
• Mini Root, 4-function, %, sq rt., green VFD, horizontal shape.
• 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.
• Personal I aka H802, listed in book. Photo.
• Personal M-I aka H813B, listed in book. Photo.
• Personal-Mini, listed in book. Photo.
• Personal-Mini aka CM-607, listed in book.
• 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.
• 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.
• Root-8, listed in book.
• ST-1, listed in book.
• Y-811 aka Memory 8-R, listed in book.

CBC (CBC International Group of Companies)

• 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.

Century Mark IV (These calculators are reported to have been made for and exclusively distributed by Gulf Oil Mail Order. An address at Tinley Park, Illinois, U.S.A., is given on the back of one of them.)

• Centurion, listed in book.
• Mark IV, listed in book. Photo. This is featured in the Puzzle Corner page of this site.
• Bowmar Century Mark IV (aka 90512), listed in book. Photo. This is featured in the Puzzle Corner page of this site.

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)

• Chinon 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.
• Chinon 1800M, 4-functions, memory, red LED, 4-AA rep. batt.. Photo. Mar 07.
• Executron 8M/2, 4 funct, mem, %, sq root, 8 digit green fluorescent, 4-C rep batt, 122x213x48mm / 4.8x8.4x1.9", Japan. Photo.

Citaco

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

CI (CI Business Machines, a division of C. Itoh & Co. Ltd., Tokyo, Japan. See also C. Itoh)

• 8005, 4 function, %, memory, sq rt, green VFD, 4-AA rep. batt., 85x137x35mm / 3.3x5.4x1.4", Japan. Photo.
• Prismatic LC 800, 4 function, %, memory, early reflective LCD, 2- 9v rep. batt. (similar to the early Rockwell manufactured LCD models). Jan 07.

Citizen (Japanese manufacturer, calculators mainly seen in Europe)

• 800D, listed in book.
• 801D, 4-func, %, mem, sq rt, sq, 8-digits green VFD, 4x AA rep batt, 82x137x24mm / 3.25x5.5x1", Japan.  Photo.
• 800R, listed in book.
• 800XL, listed in book.
• 810R, listed in book.
• 820R, listed in book. Photo.
• 820SR, scientific, 8-digits green VFD, 4x AA rep batt, 85x149x24mm / 3.5x6x1", Japan. Photo.
• 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 M6, listed in book.
• Eight, 4-function, %, Sq rt.
• SR II, Scientific, 2- AA rep. batt. Jan 07.

C. Itoh (Japanese company, see also CI)

• Pocket 8, listed in book.

Clever

• 2101, 4-function, %, memory, square root, blue VFD, 1-AA rep. batt., 74x116x19mm / 2.9x4.6x0.75". Photo. Feb 08.

CM

• IV, 4-function, %, memory, square root, red LED, 9v rep. batt., similar to National Semiconductor 835. Jan 07.

CO (This calculator is a bit of a puzzle and this may be part of the model number!)

• 12 X, 4-function, %, memory, square root, blue VFD, 4-AA rep. batt., 74x116x19mm / 2.9x4.6x0.75". Photo. Feb 08.

Colex

• 811-A, listed in book.
• ESR-70, listed in book.

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

• Columbia, listed in book.
• Columbia-2, listed in book.
• Columbia-3, listed in book.
• Columbia-3M, listed in book.
• Memory II, 4-function, memory, red LED, rech. batt., 76x142x26mm / 3.0x5.6x1.0", U.S.A. Photo.
• Scientific, listed in book.

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.
• 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.
• 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, 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.
• 897D, listed in book. Photo.
• 899A, listed in book. Photo.
• 899D, listed in book.
• GL-96D, 4 function, %, green VFD.
• GL-97D, 4 function, %, memory, square, reciprocal, 7 digits green fluorescent, 3x5.5", Japan. Photo.
• GL-976MR, 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.
• 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.
• 997R aka GL997R, listed in book.
• 997RF aka GL997RF, listed in book. Photo.
• 4109, 4-function, %, memory, sq rt., square.
• 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.
• 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.
• MM2 aka Minuteman MM2, listed in book. Photo, inside.
• MM2PM aka Minuteman MM2PM, listed in book.
• 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.
• 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.
• 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.
• 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.
• SR4921, scientific, red LED, RPN.
• SR5190R, listed in book.
• SR6120R, listed in book.
• SR6140R, listed in book.
• SR7919, listed in book.
• 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.
• X24, 4-function, %, memory, sq rt., 8-digits green VFD, 2-AAA rech batt., Japan.

Compex (Cal-Comp Electronics, Inc.)

• AK-10, listed in book.
• 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.

Compuad (Australian company - Compuad Australia Sales)

• 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)

• 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.
• 344 aka Statistician, similar to 340.
• 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.

Computech

• M-801, listed in book.

Computex

• Computex, 4-function, red LED, Japan.
• Computex, 4-function, green VFD, 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 . Aug 07.

Concept

• 24, listed in book.
• Compact, listed in book.
• V, 4-function, %, mem, red LED, 9v (PP3) rep. batt., Malaysia. Photo.
• VI, 4-function, %, mem, red LED, a "standard type 2" version. Jan 07.

Conic

• 750, listed in book.

Continental

• 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. Feb 08.

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.

Corvus (U.S. company)

• 312, listed in book.
• 322, listed in book.
• 400, listed in book.
• 406, similar to 400.
• 411, listed in book.
• 415, listed in book.
• 500, listed in book.
• 625, listed in book.
• 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. Mar 08.

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.
• 4505, listed in book.
• 4506, listed in book.
• 4507, listed in book.
• 4508, listed in book.
• 4509, listed in book.
• 4509B, listed in book.
• 4511, listed in book.
• 4511A, listed in book.
• 4512, listed in book.
• 4512A, listed in book.
• 4513, listed in book. Photo.
• 4514, listed in book.
• 4515, listed in book.
• 4516, listed in book.
• 4517, listed in book. Photo.
• 4518, listed in book.
• 4519, listed in book.
• 4520, scientific, green VFD, 2-AA.
• 4521, listed in book.
• 4522, listed in book.
• 4523, listed in book.
• M100 aka Translator, listed in book.

Cristalonic (German company)

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

Crown Radio

• CL-130, listed in book.

Cybernet

• 6PD, listed in book.

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 . Jun 2007.

D

Daltone

• 80, listed in book.
• Opti-Cal 1, listed in book.

Dataking

• EC-868, 4-function, %, memory, red LED, 5- AA rep. batt. Jan 07.
• LC-800, listed in book. Early reflective LCD (1973-74) model made by Rockwell, unusually powered by two PP3 9v batteries. Photo.

Decimo (English company)

• 2001-e "electronic slide rule extraordinary", scientific, 10 digits mantissa, 2 digits exponent red LED, 72x148x20mm / 2.8x5.8x0.8", Hong Kong. Photo. Featured British calculator.
• Da Vinci, listed in book. Photo. Featured British calculator.
• Handy M, 4 function, %, memory, red LED. Photo.
• International, 4 function, 6 digits green VFD, 4-AA rep. batt., 82x137x25mm / 3.2x5.4x1.0". Photo. Featured British calculator. Apr. 07.
• Memory Man, 4 function, %, memory, green VFD, 4x AA rep batt, 90x149x32mm / 3.5x5.9x1.25", Japan. Photo. Featured British calculator.
• Memory Man II, 4 function, %, memory, red LED, 9v rep batt, 2.9x5.3", Taiwan. Photo.
• Ready Reckoner (aka 674), 4-function, %, red LED, 4x N rep batt, 69x149x17mm / 2.7"x5.9"x0.7". Photo. Featured British calculator.
• Strand, 4-function, %, green VFD. Jan 07.
• Super Vatman 4 funct, mem, %, sq rt, sgn chg, pi, 8 digit fluor, 4-AA rep batt, 3.0x5.25", Japan.
• Super Vatman M, listed in book. Photo.
• Super Vatman SS I, 4 function, memory, square root, square, green fluorescent, 9v rep batt, 83x130x38mm / 3.3x5.2x1.5", Japan, Photo. Featured British calculator .
• Super Vatman SS II, 4 function, VAT %, memory, square root, green fluorescent, 9v rep batt, 83x130x38mm / 3.3x5.2x1.5", Japan, ~1976. Photo. Featured British calculator .
• Vatman, listed in book, but there are several variations - see Featured British calculator.
• 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 British calculator.
• Vatman Executive, Type 1 (red LED version), 4 function, %, 3v (2-AA rep. batt.), 76x126x19mm/3.0x5.0x0.75", c1974. Featured British calculator.
• Vatman Executive, Type 2 (green VFD version), listed in book. Featured British calculator.
• Vatman Extra M, 4-function, memory, square root, green VFD, 2-AA rep. batt., 81x126x22mm / 3.2x5.0x0.9", Japan. Featured British calculator.
• Vatman Extra S, 4-function, memory, square root, square, reciprocal, green VFD, 2-AA rep. batt., 81x126x22mm / 3.2x5.0x0.9", Japan. Featured British calculator .
• Vatman Memory 4 funct, mem, %, sq rt, sgn chg, 8 digit green fluor, 4-AA rep batt, 3.2x5.2", Japan. Featured British calculator.
• Vatman Mini.  Featured British calculator.
• Vatman Mini II, 4 function, %, 1- AA rep batt, 2.6x3.9". Photo. Featured British calculator.
• Vatman Mini M. Featured British calculator.
• Vatman Mini M II. Featured British calculator.
• 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 British calculator .
• Vatman Scientific, Scientific functions, green VFD, 2-AA rep. batt., 82x158x28 mm / 3.25"x6.25"x1.1". Photo. Featured British calculator .
• Vatman Spy, 4 function, %, 8-digit red LED, 62x98x21mm / 2.4x3.9x0.8". Photo. Featured British Calculator. Mar 07.
• Vatman Student, scientific, green VFD, 76x136x19mm. / 3.0x5.4x0.75". Photo. Featured British Calculator .
• Vatman Super Spy, 4 function, %, memory, square root, square, reciprocal, 8-digit red LED, 62x98x21mm / 2.4x3.9x0.8", ~1975. Photo. Featured British Calculator.
• Vatman V.Sc. I, limited scientific. Featured British calculator.
• Vatman V.Sc. II, limited scientific, green fluorescent, 4-AA rep batt, 83x130x28 / 3.25x5.2x1.1", Japan. Photo. Featured British calculator .
• Vatman Vantage, listed in book.
• Vatman X, 4 function, %, EX, green fluorescent, 4- AA rep batt, 3.3x5.2", Japan. Photo. Featured British calculator.

Deetee

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

demitronics (Japanese company)

• 800-X, 4-function, red LED, 4-AA rep. batt., Japan. Photo. May. 07.

Detron (European market company)

• 805MD, listed in book.
• 830 MD 4 funct, mem, %, sq rt, 8 digit fluor, 1-AA rep batt, 3.0x4.75", similar case to Caltek 830D, has "HTH" on nameplate on front, Korea.

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

• E406, listed in book.
• 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.

Devtron

• SI-36, scientific, red LED. Jan 07.

Dictaphone (U.S. company)

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

Dietzgen

• CD-1, 4-function, green VFD separate tubes, rep. batt. Jan 07.

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)

Digitrex

• MCK-8, listed in book.

Digita-Victor

• VIC-52, listed in book.

Dixons (See Prinztronic)

dsc

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

Dynson (Spanish manufacturer)

• F-81, 8 digit red LED, 4 funct, Spain. Photo.
• F-85, 8 digit 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 $23.95 plus $4 for USA first class mailing ($2 for US mailing via slower book rate, $6 for first class mailing to Canada and Mexico, and $8 for airmail to other countries). California residents please add $1.86 state sales tax.

!!!! SPECIAL OFFER !!!!

As a special offer, mention this page (newcalc1) and deduct $4 off the price of the book. This offer is only valid if you mention this page. We're trying to see how many people actually read this. If you do, it is a great way to get a great price on a great book!!

Mail to:
Wilson/Barnett Publishing
P.O. Box 345, Tustin, CA 92781-0345, USA
For additional information, contact co-author Guy Ball for additional details and purchase information.

Copyright ©1997 Guy Ball and Bruce Flamm, ©2002-2008 Nigel Tout

Vintage Calculators

© Text & photographs copyright Nigel Tout  2000-2008 except where noted otherwise.