Description: Wondrous Devices of Genius from the Age of Machines - A Webzeum of Mechanical Calculators
slide rules (7) vintage calculators (6) adders (4) adding machines (2) calculating machines (2) mechanical calculators (1) vintage adding machines (1) vintage adders (1) vintage calculating machines (1) vintage mechanical calculators (1)
'Golden' Odhner
G. Westinghouse & Co. Tallier (1870?)
Digicus (Abacus + Digital)