Following its foundation in 1961, the company focused on the manufacture of navigation cockpit clocks and pilot chronographs and sold these through direct selling, bypassing retailers.

The clocks and watches were produced according to pilot Helmut Sinn's specifications in the private label sector in Switzerland.

These include special forces such as the marine unit of the German federal police GSG 9, the fire service, divers and pilots.

German physicist and astronaut Reinhard Furrer wore the 140 S on his wrist during the Spacelab D1 mission in 1985, thus proving that a mechanical SINN watch with automatic movement also works with zero gravity.

During the Mir ’92 mission in 1992, astronaut Klaus-Dietrich Flade flew into space with a 142 S from Sinn Spezialuhren on his wrist.