'Addiator' calculating machine, c 1924.

'Addiator' calculating machine, c 1924.
Addiator' decimal adding machine with stylus and pencil on metal stand. Made by the Addiator-Gesellshaft Company of Berlin, Germany, the 'Addiator' was a relatively late mechanical calculator. It uses a chain mechanism, a stylus to add or subtract and has a capacity for nine figures.
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