Muldivo 'Mentor' calculator model WSR, 160 c1955.
circa 1955
Samuel Morland's calculating machine
1666-1695
Comptometer by Bell Punch Ltd., Model 993S
1960-1970
Monroe 88N-213 full keyboard electric desktop calculator
1950-1965
Facit mechanical calculator
1951
ADM Teacher
1950-1970
Callender cable calculating machine
circa 1904
IME - 86 electronic calculating machine
'Precisa' desk top calculator, c. 1945
1945
Calculating machine for lathe work
1920-1930
Contex 30 calculator with handbook
1970-1975
Contex-10 manual calculating machine
1950-1960
Contex-55 electromechanical calculating machine
1950-1960
Underwood Sundstrand printing calculator with typewriter platen
1930-1940
Conto adding machine for eight figures
1905-1910
Electric adding machine, 1965
1965
Cover for Triumphator Calculating Machine
1945-1965
Adding machine by London Computator Ltd. model 509/D/50
1915-1925
Program bar for National Class 31-32 accounting machine
1884-1974
Program bar for National Class 31-32 accounting machine
1884-1974
National Class 31-32 accounting machine
1884-1974
Program bar for National Class 31-32 accounting machine
1884-1974
Anita electronic calculating machine
"Arithmograph" of Leon Bollee
1895-1900
Nippon mechanical calculator model HL-21
1960-1970
Reuter's multiplying and dividing machine
1908-1920
Contex 9 figure adding machine
1945-1955
Adding machine "The Adder" no. 5766
Lipsiaddi adding machine with vendor's plate: Heinrich Daemen
1930-1940
Heureka adding machine, no.684
1907-1920
Contex 2 calculator
1970-1975
Olivetti Divisumma Tetractys. Superautomatic printing calculator with two registers
1962
FACIT electrical calculating machine model ESA-O
1950-1955
Automultiplicateur Eggis
1918-1922
Anita electronic calculating machine, model LT4
Plus Rapid adding machine, standard farthings model
1939
Mear's gas flow calculator.
'Sumlock' adding / calculating machine no. 912/S/3475
1950
Mechanical calculator for centre of gravity of Hotspur aircraft
Anita Mk VIII Electronic Desktop Calculator
circa 1963
Calculating machine invented by Charles Stanhope in 1777
1777
Program bar for National Class 31-32 accounting machine
1884-1974
Program bars for National Class 31-32 accounting machine
1884-1974
Unitas calculating machine
1900
Calculating machine invented by Sir Samuel Morland
1664
Triumphator Calculating Machine
1945-1965
Ultra electromechanical calculating and listing machine by Oerlikon
Calculating machine
1880-1884
"Sumlock" adding/calculating machine no.912/S/3475
1950
Electronic desk calculating machine
1956