Sinn is a German manufacturer of mechanical and quartz wristwatches based in Frankfurt am Main. The company was founded in 1961 by flight instructor and Luftwaffe pilot Helmut Sinn (1916–2018) under the name ‘Helmut Sinn Spezialuhren’.
History
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.
In the 1960’ and 1970s Sinn manufactured cases for military and consumer purposes, most notably the Heuer/Sinn Bundeswehr,[1] of which there were two general configurations of Sinn-branded dials that included the Heuer logo: the "3H-only" - a red 3H-symbol appears just below the center, and the "clean" - no markings beyond the "Heuer" logo, and two with only the Sinn logo.[2]
In 1985, the Sinn 140 S chronograph was among the first automatic chronographs to be used in space.[1]