In 1955 René Bannwart and Simone Ries founded this company in La Chaux-de-Fonds, specializing in extravagant watches with mechanical and quartz movements.
The first workshop of Corum originated in a small factory, headed from 1924 by Gaston Ries (1891-1958), the father of Simone. Bannwart and Simone Ries took the lead and in 1956 brought the first watches designed by René Bannwart on the market.