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 and airplane pilots, 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.