Certified engineer Lothar Schmidt began working for Sinn Spezialuhren in September 1993. Prior to this, he had been working since 1981 for International Watch Company (IWC) in Schaffhausen, Switzerland, first as a freelancer, then as an authorised representative. He was responsible for setting up and operating case and strap production, as well as construction and design. Subsequently, he was in charge of setting up and operating component production. From 1990 up until his retirement, he was also in charge of overseeing the development of production and logistics at the then-subsidiary of IWC, A. Lange & Söhne in Glashütte, Saxony, which had been restored following the collapse of the East German government. Under his leadership, Sinn Spezialuhren underwent major changes. It split from the private label sector, expanded its model range, and developed its own watch models and innovative technologies. In addition to direct selling, Lothar Schmidt introduced the concept of distributors: selected watchmakers who also sell the watches. Furthermore, the name of the company was changed to Sinn Spezialuhren GmbH. Most of the company’s watches are assembled and regulated in Frankfurt am Main. Over 12,000 watches are currently sold every year.