Vintage Calculator Madas 20BZS Portable Calculating Machine Made by H. W. Egli in Switzerland c. 1950

Calculators Madas 12 (first of its' kind) and Madas 20BZS are portable calculating machine an iconic piece of 1930s and 1950s history made by H. W.

Vintage Calculator Madas 12 (in working condition) and Madas 20BZS portable calculating machine made by H. W. Egli in Switzerland (c. 1930)

Vintage Calculator Madas 20BZS Portable Calculating Machine Made

John Wolff's Web Museum - Hans W. Egli

National Museum of American History

Antique MADAS Calculator with Automatic Division. USA, 1913

Vintage Calculator Madas 20BZS Portable Calculating Machine Made

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John Wolff's Web Museum - Hans W. Egli

Antique MADAS Calculator with Automatic Division. USA, 1913

MADAS - Jaap's Mechanical Calculators Page

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John Wolff's Web Museum - Hans W. Egli

MADAS - Jaap's Mechanical Calculators Page