Accurator

Accurator, decimal model, 'Made in Hong Kong. Britsh Empire.'

Addiator

Addiator Sterling currency model. Featured calculator.

Addiator Addfeet Junior, feet and inches model, c1960s-1980s, Germany. Featured calculator.

Addiator Addimax Sub-Zero, decimal model designed to display a negative balance in a second set of windows, 5 decades. Machine in photograph shows -12345. c1960s.

Addiator Arithma (with pouch and stylus), decimal model, 6 decades. Mar 18.

Add-Index

Add-Index, mounted on a cash drawer, is similar to the 'American' adder Combination Cash Register.

Addmaster

Addmaster 208H, inside, electrically-driven, 10-key add-lister.

Addmaster Baby, Sterling currency, 'Addiator', c1960s. Featured calculator.

Addmaster Indian currency calculator, 'Addiator'. Featured calculator.

Addo (Swedish company. Some calculators also manufactured by British subsidiary.
Addo-X models are 10-key machines).

Addo Mod 9, full-keyboard add-lister for the old sterling currency (£sd). Featured on British calculator site.

Addo Mod 16, full-keyboard add-lister for the old sterling currency (£sd). Featured on British calculator site.

Addo Multo Mod 3, photo of mechanism, pinwheel calculator with 10-decade setting register, 13-decade result register, 8-decade counting register.

Addo-X, 10-key add-lister.

Addometer

Addometer standard decimal model, dial calculator. Featured calculator.

Addometer feet and inches model, dial calculator. Featured calculator.

Addometer Sterling currency model, dial calculator. Featured calculator.

Baby

Baby Calculator, decimal 'Addiator', 7 decades.

Bell Punch Co. (British manufacturer, used the names Plus, Sumlock, and after 1960 Comptometer ). To see more photographs of other models visit the sister site about the Bell Punch Company calculators.

Comptometer 993m, electrically driven Comptometer with storage register, Britain, 1969s. Featured on sister site.

Comptometer 993s, electrically driven Comptometer with storage register, Britain, 1969s. Featured calculator.

Plus AdderS, Sterling currency abbreviated 'Comptometer' type, 1940s. Featured on sister site.

Plus 506/D, abbreviated, decimal 'comptometer', 1950s/1960s. Featured calculator.

Plus 509/D, abbreviated, decimal 'comptometer', 1950s/1960s. Featured on sister site.

Plus 509/T, abbreviated, time 'comptometer', 1950s/1960s. Featured on sister site.

Plus 509/Y, abbreviated, imperial weight 'comptometer', 1950s/1960s. Featured on sister site.

Plus 512/S, abbreviated, Sterling currency 'comptometer', 1950s/1960s. Featured on sister site.

London Computator Corporation Sumlock 912/S.

Sumlock 912/S, Sterling currency 'comptometer', 1950s/1960s. Featured calculator.

Sumlock 912/Y, imperial weight 'comptometer', 1950s/1960s. Featured on sister site.

Bohn Contex (U.S. company Bohn Rex-Rotary marketed some mechanical calculators made by Contex, see Contex.)

Britannic(British company)

Britannic, pinwheel calculator, England. Featured on British calculator site.

Britannic Duo, dual pinwheel calculator, England. Featured on British calculator site.

Brunsviga(German manufacturer)

Brunsviga 10, stepped gear calculator, 1930s/1940s. Featured calculator.

Brunsviga 13Z, double calculator. Comprising two pin-wheel calculators joined together, double calculators made some types of calculation much easier.

Brunsviga Addsum 94T, Sterling currency, full-keyboard adder, 1950s-1960s, Germany. Featured calculator.

Brunsviga D13, double calculator. Comprising two pin-wheel calculators joined together, double calculators made some types of calculation much easier.

Burroughs (U.S. company, also manufactured in Scotland and France)

Burroughs ABC Universel AP series J, Sterling currency, electrically driven, 10-key add-lister, 1960s/1970s, France. Featured calculator.

Burroughs E5, without cover, decimal 5-decade 'comptometer', 188x291x122mm / 7.5x11.5x5.

Burroughs 'comptometer' type calculator.

Burroughs J281, with cover removed, 10-key add-lister, electrically driven, Brazil, c1950s/60s.

Burroughs model P (S), Sterling currency, hand-driven add-lister, Scotland, c1950s/1960s. Featured calculator.

Busicom(Japanese manufacturer, originally Nippon Calculator)

Busicom / Nippon Calculator HL-21, pinwheel calculator, 1960s. Featured calculator.

Commodore (in the 1960s Commodore sold 10-key mechanical calculators)

10-key calculator with badge for the British Distributor OEM (Office and Electronic Machines Ltd.) - if you know the model number please get in touch.

Comptometer (Manufactured by Felt & Tarrant Manufacturing Co. U.S.A., after 1960 by Bell Punch Co.)

Comptograph 101, 1950s - 1960s, manufactured by Walther in Germany. Featured on sister site.

Comptometer 992 for Sterling currency (£sd), 1950s - 1960s, electric motor driven. Featured calculator.

Comptometer model J for Sterling currency (£sd), 1920s - 1940s. Featured calculator.

Comptometer model J for Imperial weights, 1920s - 1940s. Featured calculator.

Contex (Danish manufacturer - some models were marketed by the U.S. company Bohn Rex-Rotary and are labelled Bohn Contex)

Bohn Contex, hand-operated, 10-key, c1960s.

Contex, Sterling currency, abbreviated-keyboard adder, Denmark. Featured calculator.

Countess (distributed in Britain by Bowler Products Ltd.)

Countess, Sterling currency, dial calculator, c1960s. Featured calculator.

Curta

Curta I, miniature stepped gear calculator, 1948-early 1970s. Featured calculator.

Dalton (Dalton Adding Machine Co., U.S.A.)

Dalton, was the first 10-key adding machine. Designed by Hubert Hopkins in 1902 the early models have glass panels in the sides through which the mechanism can be seen. Pictured is a later model.

Decimo (British marketing company)

Decimo 10-key add-lister, Japan. Featured on British calculator site.

Efficience

Efficience, unusual 9-decade 'Addiator' type stylus adding machine, Belgium, c1930s.

Exactus

Exactus Mini-Add, England. Featured on the British calculator site.

Faber-Castell (German slide-rule manufacturer)

Faber-Castell 67/54 Rb DARMSTADT, combined Addiator and slide-rule. Featured calculator.

Faber-Castell 67/87 R RIETZ, combined Addiator and slide-rule. Featured calculator.

Facit (for an illustrated history of Facit calculators go to James Redin's site at http://www.xnumber.com/xnumber/cmisc_facit_page.htm)

Facit, pinwheel calculator, c1950s.

Facit CI-13, hand-driven, keyboard-set, pinwheel calculator, 1957-1970s. Featured calculator.

Facit CM2-16, hand-driven, keyboard-set, pinwheel calculator, 1959-1967.

Facit ESA-01, electrically-driven, keyboard-set, pinwheel calculator, 1949-1956. Featured calculator.

Facit T, hand-driven, keyboard-set, pinwheel calculator, 1932-1939. The first Facit keyboard-set pinwheel calculator.

Famosa

Famosa, Pinwheel calculator. c1960s.

Felt & Tarrant (U.S. manufacturer, see Comptometer)

Friden (U.S. manufacturer)

Friden SR101, can extract quare roots.

Fuller (Made by W.F. Stanley & Co., London)

Fuller Calculator Model No. 2, a desktop spiral slide-rule, with one scale of 42 feet (12 metres) length and two of 30 feet (9 metres). Compare with the hand-held Otis King calculator.

Golden Gem

Golden Gem, chain adder. Featured calculator.

Imperial (Imperial Typewriter Co., British company, became part of the Litton Industries group)

Imperial Office Master, hand-operated, 10-key add-lister, 1970, Germany. Featured calculator.

Imperial Office Master Electric, electrically-driven, 10-key add-lister, 1970, Germany. Featured on British calculator site.

Kingson

Kingson Four-Rule front, rear, combined 'Addiator' and slide-rule, c1960s, Hong Kong. Featured calculator.

Kingson Pocket Calculator, Sterling currency 'Addiator', c1960s, Hong Kong. Featured calculator.

London Computator Corporation (See Bell Punch Co.)

Madas (Multiplication, Automatic Division, Addition, and Subtraction, made in Switzerland by H.W. Egli)

Madas 20AZG, electrically driven stepped gear calculator with automatic multiplication and division, 1950s/1960s. Featured calculator.

Marchant (U.S.A. company, for more details and calculator serial numbers see Marchant in the Calculator Companies section)

An early keyboard model Marchant, photo 2.

Marchant 8CM, electrically driven.

Marchant 8D, 4-functions, electrically driven, c1942.

Marchant Figurematic, 4-function, full-keyboard, 1950s/60s.

Marchant H6, photo 2.

Twin Marchant. Featured in the article 'The Twin Marchant and its place in history'.

MBC

MBC Pocket Calculator, 'Addiator'-type.

Melitta (German company)

Melitta, pinwheel calculator, introduced c1925.

Melitta, pinwheel calculator, c1960s.

The Millionaire (manufactured by H.W. Egli in Switzerland)

The Millionaire, direct-multiplication calculator. Featured calculator Apr 19

Monroe (U.S. company)

LN-160X, stepped-gear calculator. Featured calculator.

Muldivo (British marketing company, see the Muldivo section of the British calculator site)

No model number, made in France, 1920s. Featured on British calculator site.

Muldivo AE (made by Thales), Germany.Featured on British calculator site.

Muldivo DER (made by Thales), Germany.Featured on British calculator site.

Muldivo Mentor, (re-badged Walther WSR160), pinwheel calculator, Germany, 1960s. Featured calculator.

Nippon Calculator(Japanese manufacturer, changed its name to Busicom)

Nippon Calculator / Busicom HL-21, pinwheel calculator, 1963. Featured calculator.

Nippon Calculator SM-21, pinwheel calculator, 1956. Featured calculator.

Numeria

Numeria 7903, c1950s/60s, Italy. Uses an unusual mechanism based on movable pins on sector plates (for details see http://www.rechenwerkzeug.de:80/numeria.htm).

Odhner

Odhner, pinwheel calculator, c1935-1945, Sweden. Featured calculator.

Odhner, pinwheel calculator, c1960s, Sweden.

Odhner LUSID, pinwheel calculator for £sd Sterling currency. Featured calculator.

Olivetti(Italian manufacturer, also sold in the U.S.A. under the Underwood name)

Olivetti Audit 413, photo 2, accounting machine, electrically driven. Appears to be for calculating in the old Sterling £sd currency, based on the Olivetti Tetractys 4-function calculator.

Olivetti Electrosumma 22R, Sterling currency, electrically driven, 10-key add-lister, Italy, 1960s. Featured calculator.

Olivetti Quanta 20, inside 1, inside 2, Sterling currency (£sd), electrically driven, '10-key add-lister', Italy, 1960s.

Olivetti Simplex, inside 1, inside 2, Sterling currency (£sd), hand-operated, '10-key add-lister', Italy, 1960s.

Olivetti Summa Prima, inside 1, inside 2, Sterling currency (£sd), hand-operated, '10-key add-lister, Italy, 1960s'. Featured calculator.

Olivetti Summa Prima 20, inside 1, inside 2, decimal, hand operated, 10-key add-lister, Italy, 1960s.

Olivetti Summa Prima 20 (£sd), inside 1, inside 2, Sterling currency (£sd), hand operated, '10-key add-lister', Italy, 1960s.

Otis King (cylindrical slide-rules manufactured in Britain by Carbic Ltd.)

Otis King model L, cylindrical slide-rule, 1920s to 1970s. Displayed here since it was a competitor to the early hand-held electronic calculators. Featured calculator.

Plus (See Bell Punch Co.)

Pocket Adding Machine

Pocket Adding Machine, sterling currency 'Addiator', 5 £ decades, 86x128mm/3.4x5', similar to Pro Calculo.

Problem Solver

Problem Solver, is a relabelled Olivetti Summa Quanta 20, electrically driven 10-key add-lister, dating from the 1960s. If you have any information about why this is labelled 'Problem Solver' please get in touch.

Produx

Produx Multator photo 1, photo 2, c1960s.

Remington (also manufactured typewriters and were part of Sperry Rand)

Remington 221, Electrically-driven, 10-key add-lister. c1960s.

R C Allen

R C Allen, full-keyboard add-lister. c1950s-1960s.

Ricoh (Japanese company)

Ricoh Ricomac 218 ½, ten-key electro-mechanical add-lister.

Rolls Record

Rolls Record - 6, photo of subtraction side, stylus operated 'Addiator'-type decimal calculator, 6 decades, addition on front, subtraction on back.

Rolls Record - 9, photo of subtraction side, stylus operated 'Addiator'-type decimal calculator, 9 decades, addition on front, subtraction on back.

S & N (Seidel & Naumann)

Sterling currency adding machine. From 1910 - .

Smith Corona (U.S. company, also Smith Corona Marchant (SCM))

Smith Corona model unknown, hand-operated, full-keyboard add-lister. Featured calculator.

Smith Corona SCM 1011 CB, electrically driven, 10-key add-lister, 1960s, Japan. Featured calculator.

SUN (See S & N)

Sumlock (See Bell Punch Co.)

Thales

Thales, c1950s-1960s.

TIM (Time Is Money)

TIM (Time Is Money) stepped-drum calculator, early model, with number setting by sliders.

Triumphator

Triumphator CRN2, pinwheel calculator, ~early-1960s, East Germany (DDR).

Victor

Victor, full-keyboard add-lister, c1950s-1960s, U.S.A.

Victor Tallymaster (model 67 57 50), inside 1, inside2, electro-mechanical 10-key add-lister, U.S.A.

Walther (German manufacturer)

Walther WRS160 (badged as the Muldivo Mentor), pinwheel calculator, 1960s. Featured calculator.