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'Addiator' calculating machine, c 1924.

Richardson, Claire

'Addiator' calculating machine, c 1924.
3 4 c m
actual image size: 32cm x 26cm


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

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© Science Museum / Science & Society Picture Library

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