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Odhner Arithmometer
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The Odhner Arithmometer was a very successful pinwheel calculator invented in Russia in 1873 by W. T. Odhner, a Swedish immigrant. Its industrial production officially started in 1890 in Odhner's Sain
An Odhner machine made under the management of W.T. Odhner in Saint Petersburg before 1900
An Odhner machine made under the management of W.T. Odhner in Saint Petersburg before 1900
Brunsviga
Brunsviga
Thales
Thales
Original design
Original design