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.
Displays are 8-digits unless described otherwise.
Go to P Q R
P
PACIFIC ELECTRONICS
- 100B, 4-function, red LED, Taiwan, 'Klixon' keypad. Jan. 24.
Panasonic (Manufactured by the Japanese Matsushita Corporation. Also used the name "National Panasonic")
- Correction to book - the model listed as "Electric Ruler" should actually be model # 8210, aka JE-8210U or Electronic Ruler.
- 660 aka JE-660U, listed in book.
- 801 aka JE-801A, listed in book.
- 805, listed in book.
- 830 aka JE-830U, listed in book.
- 840 aka JE-840U, listed in book.
- 850 aka JE-850U, listed in book.
- 851 aka JE-851, 4-function, green VFD.
- 855 aka JE-855U, listed in book. Featured calculator
.
- 860 aka JE-860U, listed in book.
- 880 aka JE-880U, listed in book.
- 883 aka JE-883U, listed in book.
- 885 aka JE-885U, listed in book.
- 1001 aka JE-1001, listed in book.
- 1403 aka JE1403U, listed in book.
- 1601 aka JE-1601, 4-function, %, memory, 10 digits blue VFD, 2-D rep. batt., Japan. Jan. 24.
- 2001 aka JE-2001, listed in book.
- 2003 aka JE-2003, listed in book.
- 8203 aka JE-8203U, listed in book.
- 8204, 4-function, mem, sq rt, square, blue VFD. Photo.
- 8401 aka JE-8401, scientific, green VFD, 3-AA rep. batt., Japan.
- JE-170U, 4-function, %, mem, 10-digits green VFD, 2x AA rep batt, 95x165x30mm / 3.75x6.5x1.2", Japan. Photo
.
- JE-1650U TALKING CALCULATOR, 4-function, %, memory, 10-digits blue VFD, 2-D rep. batt., Japan.
- JE-204, 4-function, %, square root, memory, 14-digits green VFD, 2x D rep. batt., Japan. Jan. 24.
- JE-1803, listed in book.
- JE-2002U, listed in book. Photo.
- JE-5001, scientific, blue VFD, 4-AA rep. batt., Japan.
- JE-6220U, 4-function, %, memory, square root, VFD, Japan. Photo.
- JE-8000, 4-function, %, blue VFD, 2-AA rep. batt., Japan. Jan. 24.
- JE-8000U, 4-function, %, green VFD, 2-AA rep. batt., 103x66x22mm / 4.1x2.6x0.9", Japan. Photo
.
- JE-8003, 4-function, %, square root, blue VFD, 2-AA rep. batt., Japan.
- JE-8210U "Electronic Ruler", listed in book. Photo
.
- JE-8220, listed in book.
- JE-8221, listed in book. Photo.
- JE-8800, 4-function, %, blue VFD, 4-AA rep. batt.
- JE-8800U, 4-function, %, blue VFD, 4-AA rep. batt.
- National Panac 815 aka JE-815, 4-function, 4-?? rep. batt., Japan. Jan. 23.
- NATIONAL PANAC 881 aka JE-881, 4-function, blue VFD.
- National Panac 8005, 4-function, %, square root, green VFD, 2-AA rep batt, Japan.
- National JE-6W PiPi, 4-function, blue VFD, 4-AA rep. batt., Japan. Jan. 23.
- Panac M-3 aka JE-8203, listed in book.
- National Panac P-1 aka JE-8801, 4-function, %, green VFD, 2-AA rep batt, 78x130x27mm / 3.1x5.1x1.1", Japan. Photo.
- National Panac P-2 aka JE-8802, 4-function, %, blue VFD, 2-AA rep batt, Japan.
- National Panac Pm-1 aka JE-8001, 4-function, %, blue VFD, 2-AA rep batt, Japan.
- National Panac Pm-3 aka JE-8023, 4-function, %, blue VFD, 2-AA rep batt, Japan. Jan.
23.
- National Panac S-1 aka JE-5001, listed in book.
- Panac SD-1 aka JE-1401, listed in book.
PAN-SONIC
PASSPORT
- MARK-III, 4-function, red LED, sealed rechargeable battery, Japan.
Peripheral Magnetics (U.S. company)
- Abatron 800, listed in book.
Philips (Dutch multi-national.)
- P-8, 4-function, red LED, similar to National Semiconductor/Novus 850.
- P-35 Mathematical, scientific, red LED, similar to National Semiconductor/Novus 4510 "Mathematician".
- P-35P Mathematical, scientific programmable, red LED, similar to National Semiconductor/Novus 4515 "Mathematician PR".
- P-63 Statistical, statistical functions, red LED, similar to National Semiconductor/Novus 6030 "Statistician".
- P-84, 4-function, %, mem, red LED, PP3 rep batt, 69x139x25mm/2.7x5.5x1", U.S.A. Photo.
Phytron (British marketing company)
Pico
- PA-80D, listed in book. Photo.
- PN-80N, listed in book.
Picom
- Mini 501 Auto Constant, 4-function, %, red LED, 3-AA rep. batt. Korea.
- Mini 503C Auto Constant, 4-function, VFD.
Pioneer (see Rapid Data)
Piratron
- 720, 4-function, %, red LED.
- 721, 4-function, %, memory, red LED, 9v PP3 rep. batt.
- P-20, 4-function, %, green VFD. Photo.
- P-35, 4-function, %, square root, green VFD, 2-AA rep. batt., Taiwan.
- P-38, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
PLANAR
Plustronics
("Plustronics Ltd., a company of Photopia International Ltd." British photographic and electronic marketing company. May just have the name Plustron.)
- 81M, 4-function, %, memory, green VFD, 2-AA rep batt, 74x124x18mm / 2.9x4.9x0.75", Japan. Photo
. Featured on British calculator site.
- 108, 4-function, red LED, 4-AA rep batt, 3.3x6.5", Made in Singapore., ~1974. Buttons are clear plastic with printed inserts. Photo. Featured on British calculator site.
- 308, listed in book. Photo. Featured on British calculator site.
- 508, 4 function, %, red LED, 9v (PP3 rep. batt.), 72x109x23 mm / 2.8x4.3x0.9", Singapore. Photo
. Featured on British calculator site.
- 608, 4 function, red LED, 9v (PP3 rep. batt.), 72x135x22mm / 2.8x5.3x0.9", Singapore. Photo
. Featured on British calculator site.
- 808, 4 function, %, memory, red LED, 9v (PP3 rep. batt.), 72x135x22mm / 2.8x5.3x0.9", Singapore. Photo. Featured on British calculator site.
- 908, 4 function, %, memory, red LED, 9v (PP3 rep. batt.), 72x135x22mm / 2.8x5.3x0.9", Singapore. Photo. Featured on British calculator site.
- Educational 1, 4-function calculator, educational tool, green fluorescent, 3v (2-AA rep batt), 73x134x22mm (2.9x5.3x0.9"), Taiwan, in calculator
mode it can only operate on 2-digit numbers to give a 4-digit result. Photo. Featured on British calculator site.
- fleximind, 4-functions, %, Mastermind-type game, green fluorescent, 3v (2-AA rep batt), 78x142x19mm / 3.1x5.6x0.75". Photo. Featured on British calculator site
.
- LE-806, 4 function red LED, 6- AA rep. batt., 74x140x33mm / 2.9x5.5x1.3", Japan. Photo. Featured on British calculator site.
- Pontoon 21, Pontoon game (related to Blackjack), 4-function, square root, 10-digits blue VFD, 3-AAA rep. batt., Taiwan.
- SM838M, listed in book.
Pocket Numerology
- Calculator MDL PNC1, numerology functions added to a 'Standard Type 2' calculator, 4-funct, %, memory, red LED, 9v PP3 rep. batt., Hong Kong.
POLYGON
POLYTRON
- 6003, 4-function, %, square root, square, reciprocal, memory, green VFD, 2-AA rep. batt., Japan.
- 6005, scientific, blue VFD, 2-AA rep. batt., Japan.
- 6006, scientific, green VFD, 2-AA rep. batt., Japan.
Power (if you have any information about the company marketing this model please get in touch)
- Power, 4-funct, red LED. The circuit board is marked "TEAL HEC-8S" indicating that this calculator was made by TEAL, similar to the Apollo II calculator. Photo, inside.
POWERS TEN (Woodland Hills, CA, U.S.A.)
PRA (PRA INDUSTRIES, Chicago, Ill., U.S.A.)
- WISP, 4-function, %, red LED, U.S.A.
PRECISA
- 103, 4-function, memory, red LED, similar to Unicom 103.
- M201, 4-function, %, memory, blue VFD, 2-AA rep. batt..
- MINI 104 + MEMORY, 4-function, red LED, memory, 9v PP3 rep. batt. "Assembled in Mexico Primarily of United States Components", similar to Unicom 104.
PRECOR (atlas electronics corporation limited)
- 901, 4-function, %, memory, red LED, 3-AA rep. batt., rear slides up to access batteries. Jan. 23.
PREFECT
- MG-8M, 4-function, %, memory, green VFD, 4-AA rep. batt., Japan.
PRESIDENT
- LE-8, 4-function, red LED, 6-AA rep. batt., Japan, similar to TEAL LE-8. Jan. 24.
PrintaBowmar (Mexican company)
Prinztronic (Trade name of Dixons, a British photographic and electronics chain store)
- 4, 4-function, red LED, 4-AAA rep. batt., 55x120x20mm / 2.2x4.7x0.8", c1974, Hong Kong. Photo
. Featured on British calculator site.
- 48G. Photo. Featured on British calculator site.
- 80. Photo. Featured on British calculator site.
- 88P, listed in book. Featured on British calculator site
.
- 99P. Featured on British calculator site.
- 400, Photo. Featured on British calculator site.
- 810N, 4-function, %, red LED, 3-AA rep. batt., 78x138x20mm / 3.1x5.4x0.8", c1974, Korea, similar to TKS 2000 models. Photo, inside. Featured on British calculator site.
- 1001m, Photo. Featured on British calculator site.
- 8000, Photo.
Featured on British calculator site.
- Asset, listed in book. Featured on British calculator site
.
- C15, Photo type-1, Photo type-2. Featured on British calculator site.
- C20, listed in book. Photo. Featured on British calculator site.
- c-mos 1, 4-function, %, square root, green VFD, AA rep. batt., 80x120x29mm / 3.1x4.75x1.1", Japan. Photo
. Featured on British calculator site.
- c-mos 8m. Photo. Featured on British calculator site.
- Converter, 4-function, metric/imperial conversion, green VFD, 4-AA rep batt,
77x145x33mm / 3.0x5.7x1.3", Made in Taiwan. Photo. Featured on British calculator site.
- Countdown. Photo. Featured on British calculator site.
- Director MC 1000. Photo. Featured on British calculator site.
- Financial, listed in book. Photo. Featured on British calculator site.
- Imp, 4-function, %, red LED, 9v PP3 rep batt., Japan. Photo. Featured on British calculator site.
- LE-808P, 4-function, %, red LED, 9v PP3 rep batt., 60x105x33mm / 2.4x4.1x1.3", c1974, Japan. Photo
. Featured on British calculator site.
- M, 4-function, %, memory, red LED, 4-AAA rep batt, 2.0x4.75", Hong Kong, brown & cream colour, buttons are clear plastic with printed inserts. Similar to
Prinztronic M Memory. Photo. Featured on British calculator site
.
- M300, 4 functions, %, memory, red LED, PP3 rep. batt., 73x127x25mm / 2.9x5.0x1.0", Hong Kong. Photo
. Featured on British calculator site.
- M500, 4 functions, %, memory, red LED, PP3 rep. batt., 67x115x23mm / 2.6x4.5x0.9", Malaysia. Photo
. Featured on British calculator site.
- M800, Featured on British calculator site.
- MC85, Featured on British calculator site.
- MC95, listed in book. Photo. Featured on British calculator site
- MC99, 4 functions, memory, green VFD tubes, 6- AA rech. batt., 115x172x47mm / 4.5x6.75x1.8", Japan, c1973. Photo. Featured on British calculator site.
- MC100, 4 functions, memory, green VFD tubes, 6- AA rep. batt., 115x172x47mm / 4.5x6.75x1.8", Japan, c1973. Photo. Featured on British calculator site.
- Memory M. Featured on British calculator site.
- Micro, listed in book. Featured on British calculator site
.
- Micro II, 4 functions, %, red LED, 4- N rep. cells, 56x81x24mm / 2.2x3.2x0.95", Japan, similar to PA-80S, Pico PA 90D, and Vista Z48P. Featured on British calculator site.
- Micro 8. Featured on British calculator site.
- Micro-Game Centre, 4 functions, games-Speedway, Brain Drain, Blackjack, memory, red LED, 5-AA rep. cells, Hong Kong.
- Mini 7. Photo.
Featured on British calculator site.
- Mini Scientific. Photo. Featured on British calculator site.
- MP 300 PI. Photo. Featured on British calculator site.
- Numberman. Photo. Featured on British calculator site.
- Numberman M MEMORY. Photo. Featured on British calculator site.
- P200. Featured on British calculator site.
- P800. Featured on British calculator site.
- Powerman, 4-functions, %, memory, red LED, PP3 rep. batt., 74x138x23mm / 2.9x5.4x0.9", Taiwan. Featured on British calculator site.
- Program. Photo. Featured on British calculator site.
- SC1001M, scientific functions, red LED, 2-AA rep. batt., 68x132x24mm (2.7x5.2x0.9")., Hong Kong. Featured on British calculator site.
- SC2001m, scientific functions, green VFD, 2-AA rep. batt., 85x153x35mm / 3.4x6.0x1.4", Hong Kong. Featured on British calculator site.
- Scientific 1450. Featured on British calculator site
.
- Scientific SC500M, listed in book.
- Scientific SC1500M. Featured on British calculator site
.
- Scientific SC4001M. Photo. Featured on British calculator site.
- Scientific SC5001M, Scientific, green VFD, 4-AA rep. batt., 77x145x33mm / 2.9x5.6x1.3", Taiwan. Photo. Featured on British calculator site
.
- SR88M. Photo. Featured on British calculator site.
- SR99M. Featured on British calculator site.
- SR99P, listed in book. Featured on British calculator site
.
- X15, listed in book. Featured on British calculator site
.
- XJS. Featured on British calculator site.
Prismatic
- 500, listed in book. Photo.
Privileg (a trade name of the German chain-store Quelle International)
- 02921, 4-function, square root, square, red LED, 5-AA rep. batt., W. Germany.
- 01466, 4-function, square root, red LED, 5-AA rep. batt., W. Germany.
- 6/12, 4-function, 6-digits red LED, 4-AA rep. batt., Japan, is a Busicom Personal 60-DB with Privileg 6/12 badge.
- 66, 4-function, 6-digits red LED.
- 78, 4-function, red LED. Jan. 23.
- 82, 4-function, red LED, 9v PP3 rep. batt., 77x154x21mm / 3.0x6.1x0.8. Photo.
- 84, 4-function, %, red LED, 9v PP3 rep. batt.
- 85, listed in book. Photo.
- 583 DE, listed in book.
- 583D-E sci funct, 8 digit green fluor, 2-AA rep batt, black color, 3.0x5.75".
- 585 DE, listed in book.
- 585 D-E-NC scientific, VFD, sealed rechargeable battery, black color, 3.0x6.25".
- 685 D-S-NC scientific, blue VFD, sealed rechargeable battery.
- 800K, 4-function, amber gas-discharge display, 4-AA batt.
- 800R, 4-function, %, square root, amber gas-discharge display.
- 801, 4-function, %, red LED, 2-AA rep. batt.
- 802, 4-function, %, red LED, 9v PP3 rep. batt.
- 803, 4-function, %, red LED, membrane keyboard.
- 806De, 4-function, %, square root, blue VFD, 3-AA rep. batt.
- 808D "Mini Calculator", 4 function, %, blue VFD, 4-AA batt., Japan. Photo.
- 810D-NC, 4-function, %, blue VFD, 2-AA rep. batt. Photo.
- 812, same as Caltronic 812. Photo
, inside.
- 816 D, 4-function, %, blue VFD, 2-AA rep. batt.
- 825 MD, 4-function, %, memory, blue VFD, 2-AA rep. batt.
- 831-NC 4-function, %, square root, square, reciprocal, pi, red LED, "Assembled by Litronix".
- 833K, 4-function, %, memory, red LED, 9v PP3 rep. batt., membrane keyboard.
- 841M, 4-function, mem, %, sq rt, red LED, 9v rep. batt.
- 842M, 4-function, mem, %, red LED, 9v rep. batt.
- 848 MD, listed in book.
- 851M, 4-function, %, memory, red LED, 2-AA rep. batt.
- 853M, 4-function, %, memory, red LED.
- 856MD, 4-function, %, square root, pi, memory, blue VFD, 2-AA rep. batt.
- 860MD, 4-function, %, square root, memory, VFD.
- 861MD, 4-function, %, square root, square, reciprocal, memory, green VFD.
- 862M, 4-function, %, sq rt, mem, red LED. Photo.
- 863M, 4-function, %, sq rt, mem, red LED, 2-AA rep batt, c1975. Photo, inside.
- 865M, 4-function, %, square root, square, reciprocal, memory, red LED.
- 868MD, 4-function, %, sq rt, mem, VFD, 4-AA rep batt, similar to Sanyo case design, 3.25x5.25", Japan. Photo
.
- 872MD, 4-function, mem, %, sq funct, paren, recip, sgn chg, green VFD, 2-AA rep batt, 3.0x5.0".
- 875MD-NC, 4-function, mem, %, sq funct, paren, recip, sgn chg, green VFD, 2-AA rep batt. Jan. 23.
- 880-NC-ESR, scientific, green VFD, 4-AA batt. Photo.
- 1080 ESR-E-NC, scientific, red LED.
- 1081ESR-E, listed in book.
- beginner, 4-function, 6-digit red LED, 9v PP3 rep. batt., RPN. Photo.
- electronic 2000, 4-function, red LED, 5-AA rep. batt., "Made in W. Germany".
- MICRO COMPUTER, 4-function, red LED, rebadged Busicom handy LE-80A. Feb. 24.
- MINI CALCULATOR 832D, 4-function, %, square root, pi, blue VFD.
- Mini Calculator (aka MP308), 4-function, %, red LED, 5-AA rep. batt.
- Mini Calculator (aka tw305)
, 4-function, square-root, square, red LED. Photo.
- MINI CALCULATOR aka TS 308, 4-function, red LED, 5-AA rep. batt.
- Mini Computer (type 1), 4-function, red LED, 4-AA rep. batt., believed to be a relabelled Busicom LE-100S.
- Mini Computer (type 2), listed in book (has resemblance to the Busicom LE-80AS). Photo
.
- MINI COMPUTER (aka 00235)
, 4-function, reflective LCD, 1-AA rep. batt., flip-up display cover, resembles Sharp COS models.
- NB 800, 4-function, green VFD separate tubes, 6-AA rep. batt.
- PC 120, 4-function, counter button, 4-digit green VFD (with "->" key to show 4 more digits), similar to Sharp EL-120 but with a more stylish, more rounded casing).
- PC 4008, 4-function, red LED.
- PR57NC, scientific programmable, 8-digits mantissa & 2-digits exponent red LED, sealed rechargeable batteries, United Kingdom, similar to the the more angular version of
the Commodore PR100.
- SR 30, listed in book.
- SR35-NC, scientific, red LED, 9v PP3 rep.batt., similar to the Texas Instruments TI-30.
- SR 53, scientific, 8-digits mantissa & 2-digits exponent red LED, 3-AA rep. batt. Jan. 23.
- SR 54 NC, scientific, red LED, 9v PP3 rep.batt., similar to the Texas Instruments TI-30.
- SR58D-NC, scientific, 8-digits mantissa & 2-digits exponent green VFD.
- SR60D-NC, listed in book.
- SR80D-NC, scientific, 8-digits mantissa & 2-digits exponent green VFD, sealed battery pack.
- SR110NC, scientific, scientific red LED, sealed battery pack, United Kingdom, similar to angular version of Commodore SR-9190R.
- Sensor, listed in book.
- Super 50, 4-function, %, square root, memory, green VFD.
- Super 2002, listed in book. Photo in desktop docking unit.
Protronic (no information available about this company, but the operating manual of the Model 212 is in German. If you have any information please get in touch)
- Model 212, Scientific, green VFD, 2-AA rep. batt., 76x139x20mm/ 3.0x5.5x0.8". Photo.
- Model 535, 4-function, %, square root, green VFD, 2-AA rep. batt., Singapore.
Pulsar
- Calculator Watch, listed in book. Photo.
Pye (British company - for more information see the British Calculators site)
Pythagoras
- MK I, 4-function, %, red LED, 9v PP3 rep. batt.
- MK III, 4-function, %, square root, memory, blue VFD, 9v PP3 rep. batt., Taiwan.
- MK IV, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
- SR-26 SUPER THIN, 4-function, %, square root, blue VFD, 2-AA rep. batt.
Q
Quali (Taiwanese company)
- 112, listed in book.
- 295, 4-function, red LED.
- 312, 4-function, %, memory, red display, Taiwan. Jan. 23.
- 616, 4-function, %, memory, 12-digits red display, 4-AA rep. batt., unusual horizontal design with cover which makes it look like a
book.
Qualimat
- 5, scientific, green VFD, 2-AA rep. batt., Japan. Jan. 24.
- 84, scientific, blue VFD, 2-AA rep. batt.
- 1004, scientific, green VFD, 2-AA rep. batt., Japan.
- 7004, scientific, green VFD, 2-AA rep. batt., Japan.
Qualitron
Qualitron Industrial Corp was a Taiwanese company owned by the Lin family. Mr Stan Shih (who later founded the Acer computer group) played a major part
in establishing the company and its calculators in 1972. The company ran into financial problem in the mid-1970s. See http://www.cbronline.com/news/not_my_style_acers_shih_is_latest_ceo_to_turn_to_print.
- 614, listed in book.
- 707, 4-function, %, red LED.
- 807, 4-function, %, red LED.
- 907, listed in book.
- 910 aka "Slimline", listed in book.
- 1407, 4-function, %.
- 1437, listed in book. Photo.
- 1439, listed in book.
- 1442, listed in book.
- 1443, listed in book.
- 1444, 4-function, %, memory, sq rt, green VFD, 4-AA rep batt.
- 1445, listed in book.
- 2437R, 4-function, %, green VFD, 4-AA rech. batt., Taiwan. Jan. 24.
- 24433R, listed in book.
- 2446R aka Sliderule, listed in book.
- 2450, scientific, 8-digits green VFD. Photo.
- 2543, listed in book.
- QI-626, 4-function, %, sq rt, 4 accumulation functions, memory, 4-C rep. batt., 14-digit display, Taiwan, hard cover makes it look like a book. Jan. 23.
- QI-1014, listed in book. Photo.
- QI-1064, listed in book.
- Elegance, listed in book.
- Executive aka 007, listed in book.
- Senior Scientific, scientific & statistics, 10 digit mantissa and 2 digit exponent LED, 4-AA rep. batt., 76x146mm / 3x5.75", Taiwan, very comprehensive scientific
functions. Photo.
Quelle (see Privileg)
Quik-Check (manufacturer unknown - please get in touch with us if you have more information)
- Quik-Check, 4-function, red LED, 9v PP3 rep. batt., 57x63x42mm / 1.25x2.5x1.7", Hong Kong, c1978, one of only two known models of wrist-calculator (other is Sinclair Wrist
Calculator). Featured calculator. Photo.
Quorum (Farmington, Connecticut, U.S.A.)
- 21MS, scientific, 8-digits green VFD in single tube, 3-AA rep. batt., 68x107x23mm / 2.7x4.2x0.9", Japan. Photo, inside 1, inside 2
.
- 30S, 4-function, %, square root, square, green VFD, 2-AA rep. batt., Japan.
- 32M, 4-function, %, memory, square root, square, green VFD, 2-AA rep. batt., 78x129x25mm / 3.1x5.1x1.0", Japan. Photo.
R
R and S
RACING NOVELTIES (Little Rock, Arkansas, U.S.A.)
- Computerized Performance Rating, horse racing rating functions, 6-digit red LED, 9v PP3 rep. batt., casing resembles the small National Semiconductor calculators.
Radio Shack (a Tandy Corporation company, Fort Worth, Texas, U.S.A.. See alsoTandy.)
- EC-21, listed in book.
- EC-100, listed in book. Photo.
- EC-200, listed in book. Photo, inside.
- EC-201, listed in book.
- EC-219, listed in book.
- EC-220, listed in book. Featured calculator.
- EC-221, listed in book.
- EC-223, listed in book.
- EC-225 (type 1, red LED), listed in book. Photo.
- EC-225 (type 2, yellow LCD), 4-function, %, memory, square root, yellow LCD, 2- button cells, Taiwan. Photo, rear.
- EC-226, listed in book.
- EC-230, listed in book.
- EC-231, listed in book.
- EC-240 statesman thin, listed in book.
- EC-241, listed in book.
- EC-242, listed in book.
- EC-243, listed in book.
- EC-245, listed in book.
- EC-250, listed in book.
- EC-275, listed in book.
- EC-281, listed in book. Photo.
- EC-300, listed in book.
- EC-312 "ASTRO", listed in book. Photo, in Astro mode.
- EC-314, listed in book.
- EC-350, listed in book.
- EC-375, listed in book.
- EC-380, listed in book.
- EC-400, listed in book.
- EC-415, listed in book.
- EC-420, listed in book.
- EC-421, listed in book.
- EC-425, listed in book.
- EC-450, listed in book.
- EC-475, listed in book. Photo.
- EC-480, listed in book.
- EC-485, listed in book.
- EC-490, listed in book. Photo.
- EC-495, listed in book.
- EC-2001, listed in book.
- EC-2010, listed in book.
- EC-3000, listed in book.
- EC-3005, listed in book.
- EC-4000, listed in book.
- EC-4001, listed in book, version of the Sinclair Cambridge Programmable. Featured on British calculator site.
- Blackjack (see EC-21), listed in book.
- Teaching Calculator, listed in book.
- 4-in-1 Electronic, listed in book.
Radionic (Radionics Products Ltd., of Bristol, U.K.)
Radofin (Radofin Electronics (F.E.) Limited, Kowloon, Hong Kong. London office: King Street, London, W6. Triton was a registered trade name of the company)#.
- 8P, listed in book. Photo.
- 870 PROFESSIONAL MEMORY, 4-function, %, memory, red LED, 4-AAA rep. batt., Hong Kong.
- 875 PROFESSIONAL SLIDE RULE, 4-function, %, square root, square, reciprocal, memory, red LED, 4-AAA rep. batt., Hong Kong.
- 1000 (aka Triton), red LED, 4 functions, 3-AA rep. batt., 74x150x20mm / 2.9x5.9x0.8", c1974, Malaysia, similar to
Litronix 1000 Triton. Photo.
- 1515, listed in book. Photo.
- 1525, listed in book.
- 1610 aka Valuman, listed in book. Photo
. Featured on British calculator site.
- 1620 aka TOPAZ aka 888 aka VALUMAN-M
, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
- 1630, listed in book.
- 1640, 4-function, %, memory, red LED, 9v PP3 rep. batt., 68x132x23mm / 2.7x5.2x0.9", Hong Kong. Photo
. Featured on British calculator site.
- 1660, limited scientific, red LED, 9v rep batt, 2.7x5.2", made in Hong Kong, ~1975. Photo
. Featured on British calculator site.
- 1710, 4-function, %, red LED, 6-AAA rep. batt., similar design to the 1720.
- 1720, listed in book. Photo. Featured calculator.
- 1750, listed in book.
- 2055, 4-function, square root, memory, green VFD, 3-AA rep. batt., Hong Kong, battery compartment is along the side of the calculator. Photo.
- 2200 style 1, listed in book. Photo.
- 2200 style 2, 4-function, red LED, 9v PP3 rep. batt., 69x135x24mm / 2.7x5.3x0.9", Hong Kong. Photo
. Featured on British calculator site.
- 2500, 4-function, %, memory, red LED, 4- AA rep. batt., 78x138x37mm / 3.1x5.4x1.5", 1974. Photo
.
- 2560, Scientific, red LED, 4- AA rep. batt., 78x138x37mm / 3.1x5.4x1.5", Hong Kong. Photo. Featured on British calculator site.
- SR1630, listed in book.
- Triton 8, 4-function, red LED, PP3 rep. batt., England, c1974, has membrane keyboard. Featured on British calculator site.
- Triton 1200, 4-function, red LED, 76x154x24mm / 3.0x6.0x0.9", PP3 rep. batt., England, c1974, has membrane keyboard. Photo. Featured on British calculator site.
- Triton 1400, 4-function, red LED, 67x122x23mm / 2.6x4.8x0.9", PP3 rep. batt., Hong Kong. Photo
. Featured on British calculator site.
- Triton 1510, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
- Triton TP12, 4-function, %, thermal printer, sealed rech. batt., Hong Kong. Jan. 23.
Ragen Precision Industries (U.S. company)
- Micro-Mini, listed in book.
Rambler (Apparently a brand name of an Australian marketing company)
- 0841-M, 4-function, memory, blue VFD in separate tubes, 4-C rep. batt., Japan.
- LE-8-7, 4-function, %, red LED, 9v PP3 rep. batt.
- Rambler, 4-function, amber gas-discharge tubes, 4-C rep. batt., battery-level meter, Japan. Photo
.
Ramsgate (Ramsgate Inc., Eveleth, Minnesota, U.S.A.)
RANG (RANG ELECTRONICS PTE LTD, Singapore)
- MINI 80, 4-function, red LED, Singapore.
RandS
- 810N, 4-function, %, red LED.
- 805MD, 4-function, %, memory, blue VFD, 2-AA rep. batt., Korea.
- 821ND, 4-function, %, green VFD, 3-AA rep. batt., Korea.
- 880, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.
- 895D, 4-function, %, memory, green VFD, 3-AA rep. batt., Korea.
- UR-300, 4-function, %, square root, PI, memory, green VFD, 2-AA rep. batt., Japan. Jan. 24.
Rapid Data (Rapid Data Systems and Equipment Limited, Canada)
- 800 aka Rapidman 800, listed in book. Featured calculator.
- 801 aka Rapidman 801, 4-functions, %, red LED, 9v PP3 rep. batt., 88x146x27mm / 3.5x5.75x1.1". Photo.
- 802 aka Rapidman 802, 4-functions, red LED, 9v PP3 rep. batt., Canada.
- 804 aka Rapidman 804, listed in book.
- 812 aka Rapidman 812, listed in book. Photo.
- 824 aka Rapidman 824, scientific, red LED, 9v PP3 rep. batt., Canada.
- 1616 Executive, 4-functions, %, memory, 12-digits red LED, 9v PP3 rep. batt., Canada.
- Pioneer 1, listed in book.
Rapidex (European company)
RBM (U.S. company)
REAL
- REAL (model number not known), 4-function, %, memory, red LED.
Realtone (Euro-market company)
- 8412, listed in book.
- 9202, 4-function, %, blue VFD.
- Conversion Master KP-60, 4 function, %, memory, conversion factors, green fluorescent, 3-AA rechargeable batt, 3.5x6.1", Hong Kong. Photo.
- KP-470, listed in book. Photo.
- pc 2, 4-function, %, red LED.
- SC-40, scientific, red LED.
- SC-60, scientific, red LED.
REALTRONIC
- REALTRONIC, 4-function, %, memory, red LED, a 'Standard type-1' calculator.
- XL 103, 4-function, %, memory, red LED, 9v PP3 rep. batt., a 'Standard type-2' calculator.
Regan (Regan Industries, Glendale, Claifornia, U.S.A.)
- RA900P, listed in book. Photo.
REMA
- REMA, 4-function, %, VFD, 4-AA rep. batt., Japan.
Remington See Sperry-Remington-Rand.
Reno (German company)
- 952, Scientific, green VFD, 2- AA rep batt, 80x146x37mm / 3.1x5.75x1.4". Photo.
- 1382, Scientific, green VFD, 2-AA rep. batt.
RES (Radiant Energy Systems, Newbury Park, California, U.S.A.)
- Mark I, 4-function, memory, red LED, 9v PP3 rep. batt., Hong Kong.
- Mark VII, 4-function, %, green VFD.
- Mark IX, listed in book. Featured calculator.
Photo.
- VENTURA, 4-function, red LED, sealed rechargeable batt.
REVETRONIC
- No model number on calculator but the original box calls it the 'REVETRONIC GRADUATE CALCULATOR', 4-function, %, red LED, 70x126x21mm / 2.8x5.0x0.8", Hong Kong. Photo.
Rex (Euro-market)
- 8, 4-function, %, square root, green VFD, 2-AA rep. batt., 81x139x28mm / 3.2x5.5x1.1", Singapore, c1976. Photo
.
RFT (East German (DDR) company)
- konkret 100, listed in book.
- konkret 200, 4-funct, red LED, sealed batt, 3.25x6.5" (8.4x16.5 cm), East Germany. Photo.
- konkret 400, 4-funct, sq rt, recip, red LED, sealed batt, 3.25x6.5" (8.4x16.5 cm), East Germany. Photo
.
- konkret 600, scientific, 8-digits mantissa & 2-digits exponent red LED, sealed batt, East Germany.
- Minirex 75, listed in book. Featured calculator.
- MR-201, listed in book. Photo, inside.
Ricoh (Japanese company)
- RC-8A, 4-function, %, green VFD.
- RC-8C, 4-function, %, green VFD.
- RC-8F, listed in book. Photo.
- RC-8G, 4-function, %, square root, green VFD.
- RC-8L, 4-function, %, memory, sq. rt., green VFD.
- Ricomac RC-8M, 4-function, %, memory, green VFD, 4-AA rep. batt., Japan. Jan. 23.
- Ricomac RC-8QN, 4-function, %, memory, sq. rt., green VFD, 3-AA rep. batt., Japan. Jan. 23.
- Ricomac X-2, scientific, green VFD, 4-AA rech. batt., Japan.
- Ricomac X-10, scientific, red LED, 4- rech. batt., Japan. Photo.
- Ricomac 1213 (model 7471-22), 4-function, %, memory, 12-digits, green VFD in separate tubes, 4- C cells in rechargeable battery pack, 138x180x69mm / 5.4x7.1x2.7", Japan. Photo, inside.
RIVIERA
- 100, 4-function, %, red LED.
- 200, 4-function, %, memory, red LED. 9v PP3 rep. batt., Hong Kong. Jan. 23.
RIZ (Radio Industrija Zagreb, Ex-Yugoslavia, now Croatia).
- DESCOM 86, 4-function, %, red LED, 9v PP3 rep. batt.
- DESCOM 86M, 4-function, %, memory, red LED, 9v PP3 rep. batt.
- DESCOM 86 S, 4scientific, red LED.
RMS International (Westlake Village, California, U.S.A.)
- Zeta-3, 4-function, red LED, calculator casing made of wood "HANDCRAFTED IN THE U.S.A.".
- Zeta-5, 4-function, %, memory, red LED, 9v PP3 rep. batt., calculator casing made of wood "HANDCRAFTED IN THE U.S.A.".
- Zeta 7, listed in book.
RJP
- 880, 4-function, %, memory, change sign, red LED, 9v rep batt, 3.0x5.4", Hong Kong. Featured calculator
.
Rockwell (U.S. company. See also Anita, Galfa, House of Fraser)
- 8R, listed in book. Featured calculator.
- 9TR, listed in book. Featured calculator.
- 10R, listed in book. Photo.
- 12R, listed in book.
- 14RD, listed in book. Photo.
- 14RD-II, listed in book. Photo.
- 18R, listed in book. Photo.
- the 18T, 4-function, %, green fluor, 3-AAA rep batt, 75x137x14mm / 3.0x5.4x0.6", Hong Kong. Photo
.
- 20R, listed in book. Photo.
- the 20T, 4-function, %, memory, green fluor, 3-AAA rep batt, 75x137x14mm / 3.0x5.4x0.6", Hong Kong. Photo
.
- 21R, listed in book. Photo.
- the 22K, listed in book. Photo.
- 22MS, listed in book.
- 24K, listed in book.
- the 24K II, listed in book. Photo, inside.
- 24MS, listed in book.
- 24MS II, listed in book.
- 24RD, listed in book.
- 24RD-II, listed in book. Photo.
- 30R, listed in book. Photo.
- 31R, listed in book. Photo.
- 44RD, listed in book. Photo.
- 51R "Converter", listed in book.
- 61R, listed in book. Photo.
- 63R, listed in book. Photo.
- 64RD, listed in book.
- 74K, listed in book.
- '76, listed in book.
- 202, listed in book.
- 203, listed in book.
- 204, listed in book.
- BSR (aka Basic Slide Rule), 4-function, %, square
root, square, reciprocal, memory, blue VFD, 4-AA rep. batt., 'Assembled in Mexico from U.S. and foreign parts', similar to Sears Basic Slide Rule.
rocky
- 41, 4-function, red LED, 9v PP3 rep. batt.
Rodan (distributed in Australia by Plessey Ducon Pty.)
- 80N, 4-function, gas-discharge tubes, 122x205x45mm / 4.8x8.1x1.8".
Rodell
- Model number not known, 4-function, %, red LED, U.S.A., similar to Commodore MM3.
ROLLS MICRO ("ANOTHER FINE PRODUCT OF LUMEX ELECTRIC CO. INC., GREAT NECK, NEW YORK")
- MODEL 80, 4-function, %, red LED, 4-AA rep. batt.
Roger (see Tohotronic)
Roman
- L-0831T, 4-function, %, memory, red LED, 9v PP3 rep. batt.
Royal
(Royal Typewriter Company, a division of Litton Industries. Some models are similar to those of other Litton brands: Adler, Imperial, and Triumph.)
- 3HPD, listed in book.
- 5HPD, listed in book.
- 8MK-AD aka EC30, listed in book.
- 8S, 4-function, %, sq rt., green VFD, 2-AA rep. batt., Japan.
- 10HPD, listed in book.
- 12HC (aka UA 220), 4 function, %, square root, memory, green VFD, Japan.
- 12HT, listed in book.
- 12HTA (aka UA222), sci-funct, green fluor, 4-AA rep batt, 3.5x6.0, Japan
- 80K, listed in book. Photo.
- 81CS, listed in book.
- 81M, listed in book. Photo.
- 81SN, 4-function, %, square root, pi, memory, green VFD, 3-AAA rep. batt., 135x71x13mm / 5.3x2.8x0.5" Japan. Photo.
- 88M, 4-function, %, memory, VFD.
- 90K, listed in book.
- 90S, listed in book. Photo.
- 91K, listed in book.
- 91S, listed in book.
- 99T, listed in book.
- 1010, listed in book.
- 1020, 4-function, %, memory, sq rt., green VFD, Japan.
- 1030, sci-funct, green VFD, 2-AA rep batt, 7.5x4.75" (7.5x12 cm), silver face, brown base, Japan.
- Award GT8, listed in book.
- Award MGT, listed in book.
- Countess Royal aka UA-117, listed in book.
- D120, listed in book.
- D330, listed in book.
- D330 II aka business calculator, listed in book.
- Digital III, listed in book. Photo, inside 1, inside 2. Featured calculator.
- Digital IV, listed in book. Featured calculator.
- Digital 5, listed in book. Featured on British calculator site
.
- Digital 5-M, 4 function, %, memory, green fluorescent, 4-AA rep batt, 3.5x5.9", Made in Japan for Imperial Typewriter Company Limited, Leicester, England. Appears to be the
same as the Royal Award GT8. Photo. Featured on British calculator site.
- Digital 5-T, listed in book. Featured on British calculator site.
- Digital 88, listed in book.
- Digital 88M, listed in book. Photo.
- ESR 35, scientific functions, 10-digits mantissa & 2-digits exponent red LED, sealed rechargeable batteries, U.S.A.
- Five GT. Featured on British calculator site.
- Mini Five, 4-function, blue VFD, Malaysia.
- RC-80, 4-funct, t, red LED. Photo.
- RC-84, 4-funct, %, square root, green VFD, 4-AA rep batt, 88x157x40mm/ 3.5x6.2x1.6". Photo
.
- RC-87, 4-funct, %, memory, square root, VFD, 4-AA rep batt. Photo.
- RSC-40, 4-funct, mem, %, sq funct, recip, sgn chgn, pi, VFD, 4-AA rep batt, 3.5x6.25".
- RSC 65, scientific functions, green VFD.
- Solar I, listed in book.
- Special, 4-function, %, sq rt., green VFD, 2-AA rep. batt., Japan, available in dark and in light casing.
Ruby (NEC (Nippon Electric Company), Japan. Any connection with the Ruby calculators from Sola Enterprise, below, is not known.)
Ruby (Sola Enterprise Co., Ltd., Taiwan. Sometimes labelled "Advance Electronics Co., Ltd."-See
also there. Any connection with the Ruby calculators from NEC, above, is not known.)
- Ruby 800, 4-function, %, green VFD, 4-AA rep. batt., 78x142x25mm / 3.1x5.6x1", Taiwan. Photo
, inside.
- 800M, 4-function, %, memory, green VFD, 4-AA rep batt, 78x140x25mm / 3.1x5.5x1.0", Taiwan, marketed by Sola Enterprise Co., Ltd. Photo.
- 800P, 4-function, %.
- 1200, 4-function, 9v rep. batt.
- Ruby Super Mini 800M, 4-function, memory, red LED, 4-AA rep. batt., Taiwan.
Photo.
Click to go to :
Calculator Book Addendum A-B
Calculator Book Addendum C-D
Calculator Book Addendum E-I
Calculator Book Addendum J-O
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, ©2002-2024 Nigel Tout
Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2024.