CHM Revolution

Date Introduced

ca. 1920

Dimensions

5 x 14 x 5 1/2 in.

Manufacturer

Odhner

Credit Line

Loan of Gwen and Gordon Bell

Location

Sweden

Keywords

Mechanical calculation; Pinwheel; Baldwin, Frank S.; Odhner, Willgodt T.

Object ID

B135.80

Odhner machines were the first widely adopted "pinwheel" calculators.