TAG Heuer's heritage and history have played an important role in Swiss watchmaking. The company was founded as Heuer in 1860 and renamed TAG Heuer in 1985. Heuer's first patent in the watch world was granted in 1869 for a keyless, crown-operated winding system for pocket watches. Their contribution to chronographs has been widely documented. The Monaco, Carrera, and Aquaracer models continue to define the brand.