Morland's calculating machine
1666-1680
'Addiator' calculating machine, c 1924.
1924
Addometer adding machine with eight stylus-operated dials, c 1925.
1900-1920
Brical British calculator
1900-1909
Webb's "Adder", patented 1889, with cover
1889-1900
GEM calculator, 1890.
1890-1900
"Addiator" calculator with stylus and pencil
1924
Addiator, stylus-operated calculator for adding and subtracting sterling currency
1955-1965
"Quantotar Addiator" calculator for addition and substraction of British Weights
1924
Stima adding machine with automatic tens carry
circa 1930
Adding machine, fitted box, stylus and instructions
circa 1910
Golden Gem stylus-operated adding machine
1904-1910
Exactus stylus-operated adding and subtracting device
1930-1950
Troncet's 'Totalisateur', with pencil stylus and case
circa 1895
"Comptator" in case: complete with stylus
1920s
Troncet's "Totalisateur"
Cardboard case for Troncet's "Totalisateur"
Adding machine with stylus and instructions
circa 1900
Addometer adding machine with 8 stylus-operated dials
1900-1920
Lid for Webb's "Adder"
1889-1900
'Addimult', Sumax-E stylus operated adding and subtracting device
1955-1965
Addimult, Sumax-E stylus operated adding and subtracting device with case.
1955-1965
Kingson Pocket Calculator with stylus
Troncet's arithmograph
"Adder", adding machine patented 1889
1889-1900