Sinn

Founded in Frankfurt in 1961 by Helmut Sinn, Sinn Spezialuhren specialises in tool watches designed for demanding environments. The brand develops timepieces for aviation, professional operations and diving, with a strong focus on legibility, durability and operational safety. Its expertise in diving watches is particularly evident in the U1, U2, UX and EZM collections. Sinn notably uses German Submarine Steel, selected for its high resistance to seawater. The U1 is certified water- and pressure-resistant to a depth of 1,000 metres, with independent testing based on European standards applicable to diving equipment. The company also develops watches for genuine professional use: the EZM 2 was designed for the maritime unit of Germany’s GSG 9, while the EZM 3 was developed for professional divers. Technologies such as TEGIMENT, HYDRO and captive diving bezels further reinforce this functional approach. Sinn therefore stands as one of Germany’s most specialised manufacturers of professional dive watches and mission instruments.