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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   0-9   A   B

0 - 9

1000PR (This calculator is a bit of a puzzle - this may be the model number.)

• 1000PR, 4-function, %, square root, green VFD, 4-AA rep batt., 84x132x30mm / 3.3x5.2x1.2". Photo.

A

Abatron (from Business Electronics Ltd., a British Company).

• 803, listed in book. Photo. Featured British calculator.
• 804, 4-function, %. Photo. Featured British calculator.
• 805, 4-function, memory, red LED. Photo. Featured British calculator.

ABC

• EL-C-1, a version of the "standard type 2".

ACC

• 811A, listed in book.

ABM (Advanced Business Machines, British marketing company)

• 800, known from ad., resembles Rapid Data Rapidman 800, ~1972.

Academy

• Academy, similar to Bohsei 3000. Photo.

Ace

• MAC-19, Scientific, blue VFD, 4- AA rep. batt., 90x149x29mm / 3.5x5.9x1.1", Japan, a re-badged Casio fx-19. Photo.

Accuron

• 600, 4 function, RPN, red LED, 9v, 57x102mm/ 2.25x4", Malaysia. Photo.
• 810M 4-funct, %, green fluor, 9V rep batt, 3.25x4.5", has aluminum back panel which slides open to allow battery replacement (like some Adlers). Photo.
• 831M, listed in book.
• 841, 4-function, %, memory, red LED, 9v (PP3) rep batt., 68x120x22mm / 6.7x4.75x0.9", Malaysia, c1975. Photo.
• Executive, 4-function, %, memory,  red LED, 9v (PP3) rep batt., 65x113x23mm / 2.6x4.4x0.9", Malaysia, c1976. Photo.
• V, 4-function, %, memory.

Addmaster

• PP8, known from ad., resembles Berkey/Omega 100 and Keystone 88, ~1973.

Addo (Swedish company)

• 9218, listed in book.
• 9364, listed in book. Featured calculator.

Addometer

• Addometer, feet and inches calculator. Featured calculators.

Adler (European market calculator, models similar to Triumph, and some similar to Imperial and Royal models)

• 60, listed in book. Photo.
• 80, listed in book.
• 80C, listed in book.
• 80CS aka EC 40, 4-function, %, sq funct, recip, green VFD, 2-AA rep batt, 3.0x5.75", similar case to Royal 81CS, Japan.
• 80D aka EC 80D, 4-function, green VFD, 4-AA rep batt, Japan, horizontal style unusual for Adler.
• 80S, 4-function, %, sq rt, green VFD, 4-AA rep batt.
• 81, listed in book. Featured on sister site.
• 81C, listed in book.
• 81CS aka EC 41, 4-func, %, mem, sq rt, 8-digits green VFD, 2x AA rep batt, 78x146x18mm / 3x6x0.75", Japan. Photo.
• 81S, listed in book. Photo.
• 81SN, same as Triumph 81SN (this model was bought new in Jan 1980). Photo.
• 82M, listed in book. Photo.
• 84F, listed in book.
• 85, ANITA 851 relabelled for ADLER. Photo. Featured on sister site.
• 88T, known from a calculator comparison chart, scientific, 8 digits, recharg batt, ~1975.
• 121C, listed in book.
• 816AD, known from a price list, AC & batt, ~1975.
• Lady aka EC 20-L, 4 function, %, green VFD, 3-AAA, 62x92x22mm / 2.4x3.6x0.9", Japan. Photo. Featured calculator .
• Sir aka EC 20-S, 4 function, %, green VFD, 3-AAA, 65x95x20mm / 2.6x3.75x0.8", Japan. Photo. Featured calculator .

Adman (European market calculator)

• 121, 4 function, %, memory, sq rt., green VFD, 2-AA rep. batt., 76x138x20mm / 3.0x5.4x0.8", Singapore. Photo.
• L-0831T 4-funct, mem, %, 8 digit red LED, 9V rep batt, 3.0x5.0", Singapore. Photo.

Advance Electronics (British company)

• 88, 4-function, %, 2 memories, square root, 8 digits red LED, 5-AA rechargeable cells, 3.25 x 6", calculates to 16 digits, least sig. 8 digits revealed using <-> key, ~1975. Photo. Featured British calculator.
• Mini Executive. Featured British calculator.
• Ruby 800, 4-function, %, 8 digits, green VFD, 4-AA rep. batt., 78x142x25mm / 3.1x5.6x1", Taiwan. Featured British calculator.

Advanced Electronics (U.S. company)

• AEC 455, listed in book.

Afco (See JCE)

Agilis (European market calculator)

• 545, 4 funct, mem, %, sq funct, recip, pi, gn chg, 8 digit fluor, 3-AAA rep batt, 2.75x5.25".

AGS (No information available about this company; known examples have originated from Canada. If you have any information please get in touch.)

• AGS-8, 4-function, green VFD, 4-AA rep. batt.
• AGS-9, 4-function, %, green VFD, 3-AAA rep. batt., 86x134x30mm / 3.4x5.25x1.2", Japan. Photo.
• AGS-10, 4-function, %, memory, green VFD, 4-AA rep. batt., Japan. Photo.

Ajax (from British marketing company Acme Electric (Finsbury) Ltd.)

• No model number, 4-functions, %, red LED, PP3 rep batt, 66x126x22mm / 2.6x5.0x0.9". Photo. Featured British calculator.
• 99, 4-functions, %, memory, red LED, PP3 rep batt, 68x132x23mm / 2.7x5.2x0.9", Hong Kong. Photo. Featured British calculator .
• 2500, 4-functions, %, memory, red LED, 4-AA rep batt, 78x139x37mm / 3.1x5.5x1.5", Hong Kong. Photo. Featured British calculator .
• Litronix 1100, the label on the back is marked for distrubtion by Ajax. Featured British calculator.

Alco (U.S. company)

• 888, listed in book.
• 895, listed in book.
• Mickey Math, listed in book.

Alcor

• Grand Prix 4-funct, %, display key, 8 digit red LED, small removable sealed batt pack which plugs directly into wall outlet, 2.0x3.5", similar to Monte Carlo, Hong Kong. Photo .

Alectronica

• 8, listed in book.

Allianz

• Insurance calculator, based on the TI Programmable 58. Photo. Featured calculator.

American (U.S. company)

• American, listed in book.
• American-1776, listed in book.
• L180, listed in book.
• M-26, listed in book.

Amelia (No information available about this company. If you have any information please get in touch.)

• Scientific 2001, scientific, red LED.

aml (aml Distributors Ltd, London. British marketing company.)

• LE-8 "TRAVELLER", 4-function, red LED (unusually large), 6- AA rep. batt., 70x141x35mm / 2.75x5.6x1.4", Japan. Photo. Featured British calculator .
• LE-8C, listed in book. Photo. Featured British calculator.
• M-48, 4-function, %, memory, square root, green VFD, 4- AA rep. batt., 77x140x30mm / 3.0x5.5x1.2", Japan. Photo. Featured British calculator .

Anita (British Company, bought by Rockwell)
Note that the sister site to this one www.anita-calculators.info is dedicated to Anita calculators.

• 102, similar to Unicom 102. Photo. Featured on sister site.
• 201. Featured on sister site.
• 202/SR, scientific, green fluorescent, 4-AA rep batt, 3.2x6.1", made by Rockwell, country of manufacture unknown, similar to Rockwell 202. Featured on sister site .
• 810, 4 function, red LED, 3-AA rep batt, 69x118x24mm/2.8x4.7x1.0, England.
• 811, listed in book. Featured on sister site.
• 831. Featured on sister site.
• 841, Scientific, red LED, 3-AA rep batt, 2.8x4.7", Sumlock Comptometer Ltd., England, ~1975. Featured on sister site.
• 851, 4 function & metric conversion, red LED, 3-AA rep batt, 2.7x4.6", made in England, ~1975. Featured on sister site.
• 861, financial, red LED, 3x AA rep batt, 2.75x4.7", England. Featured on sister site.
• 1011B LSI, 4-function, %, memory, RPN, 10 digits, Nixie tubes, sealed rechargeable battery module, 8.75x6.5", England, 1971. Featured on sister site .
• 8041, Scientific, similar to 841 but with green VFD, Fi-cord International Ltd., Yugoslavia, ~1977. Featured on sister site.

APF (U.S. company)

• Mathemagician, calculator game and teaching aid.
• Mark III, 4-function, red LED, 6-AA rech. batt., 81x133x38mm / 3.2x5.2x1.5", c1973, Japan. Photo, inside.
• Mark V, listed in book. Featured calculator.
• Mark VI, listed in book.
• Mark 10, listed in book.
• Mark 14, listed in book. Photo.
• Mark 15, listed in book.
• Mark 21, listed in book.
• Mark 22, listed in book.
• Mark 23, listed in book.
• Mark 24, listed in book.
• Mark 25, listed in book. Photo.
• Mark 26, listed in book. Photo.
• Mark 27, listed in book. Photo.
• Mark 28, listed in book.
• Mark 30, listed in book.
• Mark 31, listed in book.
• Mark 32, listed in book. Photo.
• Mark 34, listed in book.
• Mark 40, listed in book. Photo.
• Mark 41, listed in book.
• Mark 42, listed in book. Photo.
• Mark 50, listed in book.
• Mark 51, listed in book.
• Mark 55, listed in book.
• Mark 56, listed in book.
• Mark 60, listed in book.
• Mark 61 (aka "Executive"), listed in book. Photo.
• Mark 61S, listed in book.
• Mark 62, listed in book.
• Mark 64, listed in book.
• Mark 65, listed in book.
• Mark 65R, listed in book.
• Mark 66R, listed in book.
• Mark 68R, listed in book.
• Mark 70, listed in book.
• Mark 71, 4-functions, %, square root, memory, red LED, PP3 rep. batt., 127x76 mm / 5x2.98", Hong Kong. Photo.
• Mark 72, listed in book.
• Mark 73, listed in book.
• Mark 74, listed in book. Photo.
• Mark 82, listed in book.
• Mark 84, listed in book. Photo.
• Mark 85, listed in book.
• Mark 86, listed in book.
• Mark 88, listed in book.
• Mark 90, listed in book.
• Mark 2000, 4-func, %, sq. rt., yellow LCD.
• RS-1, listed in book.
• RS-2, listed in book.

Apollo

• Apollo (aka ARC-8200NC), listed in book. Photo.
• Apollo II (aka NRC-9270), 4-funct, red LED, 4-AA rech. batt, 127x73x25mm / 5.0x2.875x1", interesting case design, date codes on TI IC chips are late mid-1972, "NRC New York", made in Japan. Photo, inside.

Argyle (from Spiegel, U.S. company)

• Mark III, listed in book.
• Mark 6, 4-function, %, memory, blue VFD,  -AA rep batt, Japan.

Aries (U.S. company)

• AR-420, listed in book.

Aristo (German company)

• M16 4-funct, mem, %, red LED, 9V rep batt, 2.75x5.25" c1977, Germany. Photo.
• M27, listed in book.
• M36, listed in book.
• M42S, 4-func, %, mem, sq rt, green VFD, 2x AA rep batt, Germany.
• M64, listed in book. Photo.
• M65, listed in book.
• M66S, 4-func, %, mem, sq rt, green VFD, 2x AA rep batt, 76x151x18mm / 3x6x0.7", Germany. Photo.
• M75, listed in book.
• M76S, scientific, green VFD,  Germany.
• M80, listed in book.
• M85, listed in book.
• parat 4-funct, mem, red LED, 9V rep batt, 2.75x5" (6.7x13.0 cm), Germany.
• unilog S sci-funct, red LED, 9V rep batt, 2.75x5" (6.7x13.0 cm), Germany.

Arizona (Arizona Digital Corporation, Phoenix, Arizona, U.S.A.)

• CB20, red LED, calculator in wallet, 165x75mm / 6.5x3".

Atlas (European)

• R300A, listed in book.
• R2000, scientific, 8-digits mantissa & 2-digits exponent green VFD.

Atlas Rand (U.S. - See also Berkey and Keystone)

• 240, listed in book. Featured calculator.
• 260, listed in book.
• 290, 4-function, memory, square root, amber gas-discharge, rech. batt. Photo.

Aurora

• DC10, listed in book. Photo.

Avatar (see Litronix)

B

Baltronic

• mr, 4-function, %, memory, red LED, PP3 rep. batt., a "Standard type 1" calculator. Photo. Jan 11.

Barclay

• 808, 4-function, %, memory, red LED.

Bashaw (U.S. company)

• 101, listed in book.

Belltronic

• '76, 4-function, red LED, PP3 rep batt, 82x154x28mm / 3.2x6x1.1", Hong Kong, chip CT CT5002 (7252), similar to Caltronic 606. Photo 1, Photo 2.

BenRoss

• K-80X, 4-function, blue VFD, 120x220x35mm / 4.7x8.7x1.4", Japan, similar to models manufacured by Teal. Photo.

Berkey (U.S. - See also Keystone)

• 100, listed in book. Featured calculator.
• 350, listed in book. Featured calculator.
• 370, 4-function, amber gas discharge.
• 2030, 4-function, %, memory.
• 4030, listed in book. Photo.

Binatone (British marketing company)

• 02 4252, 4-funct, %, 8-digit green VFD, 78x145x29mm / 3x5.7x1.1", Singapore, c1975. Featured British calculator.
• 02/4503, red LED.
• CADET, 4-function, %, memory, VFD, 72x125x19mm / 2.8x4.9x0.75". Featured British calculator. Jan 12.
• Brainwave, 4-function, %, memory, red LED, 70x140x24mm / 2.75x5.5x0.9", c1976, Singapore. Featured British calculator.
• Mastermind, 4-function, %, memory, sq. rt, PP3 rep. batt., 67x125x24mm / 2.6x4.9x0.9", Singapore. Featured British calculator.
• Mastermind MK 3, 4-function, memory, square root, a "Standard Type 2" model, with green VFD display.
• Memory, 4-function, %, memory, red LED, 9v PP3 rep. batt., version of the "standard type 1".
• MEMORYMASTER (aka 02-4236), 4-function, %, memory, blue VFD, 4-AA rep. batt., 80x147x29mm / 3.1x5.8x1.1", Singapore. Featured British calculator. Dec 11.
• President (aka 02-4309), 4-function, %, square root, memory, green fluorescent, 2-AA rep batt, 83x138x20mm / 3.3x5.4x0.8", Taiwan. Featured British calculator .
• Scientific Slide Rule, scientific, green VFD, 3- AA rep. batt., 80x150x34mm / 3.1x5.9x1.3". Featured British calculator.
• Super-thin, listed in book.

BMB (Business Machines Breschi, Italian company)

• 088, 4 funct, %, square root, green VFD, Japan. Photo.
• 98S, 4 funct, %, square root, pi, sign change, green VFD, 2-AA rep batt, 3.25x5.0", Japan.
• Unknown model number, 4 funct, %, square root, green VFD, 3-AA rep batt. Photo.

BMC

• Mark-88, 4 funct, %, mem, square root, square, green VFD, AA rep batt, Japan. Photo.

BMS (from Eastern Europe)

• 112, 4 funct, %, mem, square root, sq, 12 digit green VFD, 4-AA rep batt, 185x140x40mm /7.3x5.5x1.6". Photo.

Bohn (U.S.)

• Instant, listed in book. Photo.
• Omnitrex, listed in book. Photo.
• Omnitrex M, listed in book.
• Omnitrex SR1, listed in book.

Bohsei

• DT10, listed in book.
• 110, 4-function, %, sq rt, green VFD, 2- AA rep. batt.
• 140, listed in book. Photo.
• 1000, listed in book.
• 3000, listed in book. Photo. See also the "Standard Type 1 Calculator" page.

BOND

• BOND, 8 digits, red LED, 4 function, %, 9v (PP3), 62x98x21mm / 2.4x3.9x0.8", tiny LED calculator with rechargeable battery pack which plugs straight into an AC socket. Featured Calculator. Photo.

Bontronic

• 2500, 8 digits, red LED, 4 function, %, memory, 9v (PP3), 62x98x21mm / 2.4x3.9x0.8", made in Hong Kong. Photo.

Boots (British drug store chain).

• 224 Memory, re-badged Casio H-1. Photo. Featured British calculator.
• 424 SCIENTIFIC, Scientific, green fluorescent, 2-AA rep batt, 3.3x5.7", Made in Japan, (re-badged Casio fx-21). Photo. Featured British calculator.
• 425 SCIENTIFIC, listed in book. Photo. Featured British calculator.
• PD-525, 4-func, %, mem, 8-digits green VFD & thermal printer, 5x AA rep batt, 101x189x47mm / 4x7.5x1.9", Taiwan. Photo. Featured British calculator .

Bowmar (U.S. company). Click here for an article on Bowmar calculators.

• Bowmar (no model number), 4-function, %, Memory, red LED, 9v PP3 rep. batt., this is the "Standard 1" calculator design, unusually made in Hong Kong, not U.S.A., c1977. Photo.
• 901B, listed in book. Featured calculator.
• 901D "Ten", listed in book. Photo.
• 905, listed in book. Photo.
• 90506, listed in book. Photo.
• 90512,  listed in book. Photo. Occasionally found labelled "Century Mark IV". These could possibly have been made for sale by another company using the "Century Mark IV" trade name. This is featured in the Puzzle Corner page of this site.
• 90601, 4 function, red LED. Photo.
• 90911, listed in book.
• 91801, listed in book.
• 91802, listed in book.
• MX8 aka 90112, listed in book.
• MX10 aka 90150, listed in book.
• MX20 aka 90901 or Brainchild, listed in book.
• MX25, listed in book. Photo.
• MX35, 4 function, %, red LED, 69x151x20mm / 2.75x5.9x0.75", c1974.
• MX40, listed in book.
• MX50, listed in book. Photo.
• MX55, listed in book. Photo, circuit board.
• MX60, listed in book.
• MX61, listed in book.
• MX70, listed in book. Photo.
• MX75, listed in book. Photo.
• MX80, listed in book.
• MX90, listed in book. Photo.
• MX100, listed in book.
• MX120, listed in book. Photo 1. Photo 2, showing the attachable, fold-back, keyboard cover.
• MX140, listed in book.
• Century Mark IV, listed in book.
• Count, listed in book.
• Math Mate 1, listed in book.
• Math Mate 2, listed in book. Photo (3rd. digit faulty).
• The Brain, 8-digits blue VFD, similar to Count, made in Taiwan by Qualitron, c1974.

Bradford (U.S. company ?)

• 8DPS, listed in book.

Braun (German company)

• ET23, listed in book.

BRDA (Polish company)

• 12U, 4-function, %, memory, red LED, Poland.

Brinlock

• 33, 4-function, %, memory, green VFD, 2-AA rep batt, 70x134x24mm / 2.75x5.3x0.9", Hong Kong. Photo.
• 34, 4-function, %, memory, square, square root, green VFD, 2-AA rep batt, 70x134x24mm / 2.75x5.3x0.9", Hong Kong. Photo.
• 806, 4-function, %, memory, square root, green fluorescent. Photo.
• 806MII, 4-function, %, memory, square root, green fluorescent, 2-AA rep batt, 3.0x5.3", country of manufacture unknown. Photo.

Brother (Japanese company)

• 201, 4 function, %, memory, square root, green VFD, 4-AA rep batt, 3.4x5.9", Japan, ~1975. Photo.
• 202, 4 function, %, memory, square root, green VFD.
• 408, listed in book. Featured calculator.
• 408AD, 4 function, %, sq rt, fluorescent, AA rep batt, Japan. Photo.
• 408AX, listed in book.
• 408AY, listed in book.
• 408C, listed in book.
• 508A, listed in book.
• 508AD, listed in book.
• 508S, listed in book.
• 512SR, listed in book.
• 725SR, scientific, green VFD.
• 806, 4 function, %, memory, square root, green fluorescent, 2-AA rep batt, 76x135x24mm / 3x5.3x0.9", Japan. Photo.
• 807, listed in book.
• 827, listed in book.
• 827A, 4 function, %, memory, red LED.
• 827R, listed in book.
• 861, listed in book.
• 862, listed in book.
• 863, listed in book.
• M7002, 4-function, %, memory, green VFD.

Brunsviga (German company, latterly owned by Olympia)

• B22, 4-function, %, memory, square root, green fluorescent, 4-AA rep batt, 82x138x25mm / 3.0x5.4x1.0", c1976, similar to Santron models, Taiwan?? Photo, inside.

BTC

• Micro 4, 4-function, %, green fluorescent, 4-AA rep. batt., 76x135x24mm / 3.2x5.3x0.9", zeros in the display are half-height. Photo.

Busicom (Originally, Japanese company, early calcs made in Japan, but company closed in 1974 and the name was bought by Broughtons of Bristol, UK., which put the Busicom badge on calculators made by others).

• 60DA, listed in book.
• Personal 60DB, 4-function, 6 digits red LED (calculates 12 digits), 4- AA rep. batt., 86x153x42mm /  3.4x6x1.7", Japan, ~1973. Photo (note: display is faulty), inside.
• 80A aka LE-80A "handy", listed in book. Photo. Featured calculator.
• 118B, 4-function, %, memory, square root, green fluorescent, 2-AA rep batt, 3.1x5.0", ~1978, a Broughtons of Bristol model. Featured British Calculator.
• 100A aka LE-100A "handy", listed in book. Photo. Featured calculator.
• 120A aka LE-120A "handy", listed in book.
• 120DC aka Executive, listed in book.
• 120S aka LE-120S "handy", listed in book. Photo. Featured calculator.
• 801DD, listed in book. Photo.
• Colex 812-SL, 4 function, %, memory, square root, green VFD, rechargeable batteries, 78x143x18mm / 3.1x5.6x0.7" , Hong Kong (made by Colex and badged for Busicom). Photo . Featured British Calculator.
• PA-80S, listed in book.
• Unknown model number, 4-function, %, memory, square root, square, green VFD, 2- AA rep. batt., 85x155x25mm / 3.3x6.1x1.0", a Broughtons of Bristol model. Featured British Calculator.

Click to go to :
Calculator Book Addendum C-D
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, ©2002-2012 Nigel Tout

Vintage Calculators

© Text & photographs copyright Nigel Tout   2000-2012 except where noted otherwise.