Karl Scheufele III was a goldsmith and watchmaker from Pforzheim, in southern Germany, heir to the family firm Karl Scheufele, known as Eszeha, which made watches and jewellery. In 1963 he bought Chopard from Paul-André Chopard, the founder's grandson, who had no children willing to continue the business; Scheufele was looking for a Swiss manufacturer to supply movements for his own watches. According to French Wikipedia, the purchase was made through a new company in which he, his father-in-law Fr. Ruf and the Baume & Mercier executive Gerhard Walther were the main shareholders, with Walther as chief executive until 1975.
With his wife Karin he moved from Pforzheim to Geneva, and in 1974 the factory moved from the city centre to Meyrin. In 1976 Chopard launched Happy Diamonds, watches with diamonds that move freely between two sapphire crystals, which became the signature of the house. The 1980s brought men's sports watches, diamond jewellery and the first boutiques in Hong Kong, Geneva and Vienna. His children Karl-Friedrich and Caroline joined the company, and in 2001 they became its co-presidents; the family still owns Chopard. Casadi has not verified Karl Scheufele III's dates of birth and death.