Odhner Arithmometer No. 851 St. Petersburg

W.T. Odhner, St. Petersburg, Odhner Arithmometer No. 851. Sprocket wheel calculating machine. Around 1890. Brass, metal, partly painted black and nickel-plated. 9-digit setting mechanism, 13 digits in the result and 8 digits in the rotation counter with Arabic numerals. Short crank handle. 14.5 x 28.5 x 14.5 cm. Marked on the case with company brands in Cyrillic script and serial number 851. The Swedish calculating machine pioneer Willgodt T. Odhner produced the world's first sprocket wheel calculating machine in series in St. Petersburg, for which a new machine factory was built there. Calculating machines of the arithmometer type were among the most successful mechanical calculation machines until the 1940s.
Condition Report: Condition Report available on request