Millionaire Calculating Machine with Stand

In 1895, Otto Steiger, a Swiss citizen residing in Munich, obtained a U.S. patent for a calculating machine that would multiply a number by a single digit directly, with only a single turn of a crank. Earlier calculating machines required considerably more effort.

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John Wolff's Web Museum - Millionaire Register

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John Wolff's Web Museum - Millionaire Register

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John Wolff's Web Museum - Millionaire - Technical Description

Millionaire Calculator Machine Explained - Everything You Need To Know - History-Computer

John Wolff's Web Museum - Millionaire Register

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