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Friden automatic Model STW calculating machine by the Friden Calculating Machine Company

1948-1955

Automatic electromechanical calculating machine

1948-1955

Automatic electromechanical calculating machine by Friden Calculating Machine Company

1948-1955
Madas calculating machine, model 10R 1269 by H.W. Egli Limited, Zurich, Switzerland and bag.

Madas calculating machine

1960-1970