Ebauches Bettlach SA was split fro watch maker Ed. Kummer of Bettlach in 1932. It was a maker of Roskopf movements and pin-lever movements. By 1967, Bettlach produced over 7 million movements per year.
There were 22 different models produced at that time, with 1 to 17 jewels. Most used interchangeable components.
Bettlach was the only company within Ebauches SA to produce Roskopf movements.