Rex-Rotary
Rex-Rotary International Corp. A/S
Copenhagen
Denmark

Danish company producing rotary duplicators and it sold Contex (non-rotary) calculators outside Denmark and probably later bought the whole company. The designs of all Contex mechanical calculators are very avant garde and futuristic. Even materials may be quite strange, for example the Comptometer is made almost totally of bakelite. The pictures of Bohn Contex calculators in the book are nothing special. Maybe it is due to the Taiwanese producer. I once saw a Contex Omnitrex electronic desktop calculator and its form was very different. from anything I have seen.

Source : Vintage Calculators

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