Scientific Instruments > Calculating

Mechanical Pinwheel ‘Original Odhner’ Calculator Made in Sweden.

Item#: SCI1171

SOLD

 

Mechanical Pinwheel ‘Original Odhner’ Calculator Made in Sweden. - click to enlarge.

Willgodt T. Odhner invented the pinwheel calculating machines in 1874. This is a model 7 machine that was made in Goteborg Sweden with serial No.101567 and with wing nuts for clearing registers. Model 7 calculating machines were made continually during the period 1919-1934. The calculator consists of a result register with 13 positions, a proof register with 8 positions and a setting board with 10 positions. Steel buttons were made for moving the carriage; the panels are made of brass with black color. In this model all the numbers and symbols are embossed in high relief.