Montres Corum Sàrl, commonly referred to as Corum was founded in 1955 founded in La Chaux-de-Fonds, Canton of Neuchâtel Switzerland.  One year later the first Corum watches were being produced.  Severin Wunderman took over the company in 2000 after selling Gucci watches.  Then Severin Wunderman passed away in late June 2008 and just two years later Rene Bannwart, the companies original founder passed away at 95 years old.  Then in 2013 China Haidian Holdings Limited Group purchased  the company.  The company changed names and took on a partner and today is known as Citychamp Watch & Jewellery Group Limited in Hong Kong with their partners Eterna.   Which Corum and Eterna are managed by Jérôme Biard.