In 1946 a famous watch craftsmen school in La Chaux-de-Fonds teacher Georges Dubey and a watchmaker Rene Schaldenbrand set up their company, which bore their names: Dubey & Schaldenbrand. Dubey worked on a new chronograph seconds splitting system, founded by Joseph Vinnerl, who had lived one century before that time. He designed a simple principle, which was genius in its sense: a spiral spring, s…