The Millionaire Calculator

"In 1892, Otto Steiger (1858-1923) also patented a multiplication machine based in Verea’s approach. This machine was manufactured between 1895 and 1935 by Hans W. Egli of Switzerland and sold with the brand name The Millionaire. Some models weighed up to 120 pounds and about 4,700 units were sold."

James Redin , "A Brief History of Mechanical Calculators - Part II."

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Photo: Courtesy of Eusebio Huélamo.

X-Number World of Calculators