Contex

Contex #89366Contex-10

Carlsen Brothers, Gentoft, Denmark

John Carlsen was issued a patent in 1945 for a mechanical calculator. Contex  was a simple half-keyboard adding machine.The case was made of Bakelite.  In 1957 a 10-keyboard calculator was introduced. A motorized version was introduced in 1961. Production ceased in 1970s.