The company was founded in 1961 by the pilot Helmut Sinn in the city Frankfurt am Main. Based on his biography as a pilot and aerobatic instructor, he initially produced mainly watches that are specifically tailored to the needs of pilots and flight instructors. In the meantime, the company has among other things, added diver's watches to the portfolio. Special chronographs and navigation watches can now also be found in the product range. Sinn sold his products right from the start through back then very innovative direct sales. Today you can buy Sinn watches online through their own website or in person at selected retailers. At Sinn, the functionality of the watches always comes first. An example would be the EZM 12, which was developed for air rescue services. Other exciting series include The Frankfurt Financial District, the 600 or the DZ EZM 3 with magnetic field protection.