Curta Model1

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There are two major variations of the Type I : early (EarlyModel1) and late (LateModel1) versions.

The early models have a metal crank and metal clearing lever, and came in a metal carrying case. In the mid 1960s Contina changed to a plastic crank and plastic clearing lever, and supplied a plastic carrying case.

The factory phased in such changes (both the major version changes and minor component changes) over time. As a result, there are many "halfway" versions. It is these units that often spark extreme interest in collectors.

Additionally, a LeatherCase was produced and was available as an accessory.

The general specifications for each version are the same.

ModelType 1
Keyboard8 x 6 x 11
Data Entry Register (Multiplicand)8 digits
Crank Turns Counter (Multiplier)6 digits
Result Register (Product)11 digits
Add or Multiply to11 places
Divide To6 places
Diameter2 1/16 in. (53 mm)
Height3 3/8 in. (85 mm)
Weight8 oz. (230 g)

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