CHM Revolution

Date Introduced

1940 ca.

Photographer

Richards, Mark

Dimensions

6 1/2 x 11 1/2 x 11 in.

Manufacturer

Monroe Calculating Machine Company

Credit Line

Loan of Gwen and Gordon Bell

Copyright Owner

© Mark Richards

Location

United States

Keywords

Bay Area; Rotary calculator; Moving carriage; Monroe, Jay R.; Baldwin, Frank S.; Mechanical calculation

Object ID

X90.82

This four-function machine combines large capacity and small size. Monroe calculators were made at their headquarters in New Jersey, and also in Holland.