CHM Revolution

Date Introduced

1950-1960s

Photographer

Richards, Mark

Dimensions

overall: 2 x 5 1/2 in.

Manufacturer

Contina Ltd.

Copyright Owner

© Mark Richards

Location

Liechtenstein

Keywords

Stepped drum; World War II; Mechanical calculation

Object ID

102626591

Cost

$125 (1960s)

The hand-cranked Curta was popular with sports car rallyists even after electronic calculators were available. The exquisite mechanism is still studied. There are several beautiful animations on the web, and a registry of current owners.