Designed and developed by Curt Herzstark, of the Austrian Calculating Machine Manufacturing Company, and later mass manufactured by the Curta division of Contina AG of Liechtenstein. Behind this ...

A mark on the lid reads: OPEN. The Curta calculating machine was invented by the Austrian Curt Hertzstark (1902–1988).

The manual should provide a ... produced by Contina AG Mauren. mcmaven's Curta Calculator Mods heavily inspired my changes ...