Aviator Helmut Sinn founded his watch brand in 1961 with a strict focus on instrument-style watches. While the Frankfurt am Main company has offered handsome dress watches to its loyal clientele, Sinn is famous for its pilot, astronaut, and diving timepieces. Constructed to exacting tolerances and engineered rather than styled, Sinn watches are revered by professionals and prized by collectors. In the hands of professionals, Sinn’s rugged German-built watches have ventured from the depths of the oceans to outer space on the wrists of professionals with a passion for precision.