Revue Thommen is probably better known for its production of navigation instruments for the commercial and military aviation industry than of its watches. Founded originally as a watchmaker in 1853, the company branched out into aircraft instruments in the 1920s as the need for precision device manufacturers grew. A small portion of the company has always been dedicated to producing fine timepieces and until 1961 about a hundred different G.T. (Gedeon Thommen) movements were in production. This number has shrunk significantly and the company's collection now includes several pieces using ETA movements.