CURTA Calculating Machine Model I, 8x6x11 Service Manual

Contina AG. Manufacturers of Office and Calculation Machines Vaduz / Liechtenstein (via Switzerland)

The relaease date of the Service Manual is estimated to 1952/1953, based on the named Curta serial numbers and the used Biella ring binder type Colombini Acto.

The Service Manual was produced by Arnold Kessler, a leading engineer at Contina AG.