Antique Mechanical Original Odhner Calculator, Model 6. Sweden, 1920s

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Antique Mechanical Original Odhner Calculator, Model 6. Sweden, 1920s

, who is considered the father of the mechanical calculator. It is in perfect working order and makes it possible to perform the four basic arithmetical operations (addition, subtraction, multiplication and division) with a fluid and soft operation which turns its use into a real pleasure. The calculator is made of black-enameled metal, with the numerals and inscriptions enhanced in matt gold. The enameled finish is well preserved, with just some logical signs of the trace of time and the use. These details reveal the machine’s past and increase its interest and charm. At the front side we can see the embossed name ORIGINAL ODHNER – GÖTEBORG, while at the top right corner there is a white inscription reading MADE IN SWEDEN. At the back, the calculator bears the engraved serial number 78933.

Its great working order and historic interest turn this antique mechanical Original Odhner calculator model 6 a real collector’s piece, attractive and ready to be used.

Dimensions: Width: 12.20 in / 31 cm. Height: 4.72 in / 12 cm.

Odhner’s Calculators History

The history of Odhner calculators actually describes the first times of all mechanical calculators. W. T. Odhner was a Swedish engineer and entrepreneur who invented his first arithmometer (or pinwheel calculator) in Russia in 1871. Odhner was repairing a Thomas arithmometer, the only mechanical calculator in production at the time, and decided to replace its heavy Leibniz cylinder by a lighter pinwheel disk. So he created the first modern calculator whose design was imitated and reproduced countless times during the 20th century. Odhner produced and sold his owns calculators, but after the Russian revolution of 1917 he moved to Sweden and opened a new factory where he manufactured his arithmometers under the ‘Original Odhner’ commercial name.