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.
|Keyboard||8 x 6 x 11|
|Data Entry Register (Multiplicand)||8 digits|
|Crank Turns Counter (Multiplier)||6 digits|
|Result Register (Product)||11 digits|
|Add or Multiply to||11 places|
|Divide To||6 places|
|Diameter||2 1/16 in. (53 mm)|
|Height||3 3/8 in. (85 mm)|
|Weight||8 oz. (230 g)|