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