Omega SA (UK /ˈoʊmɨɡə/; US /oʊˈmeɪɡə/) is a Swiss luxury watchmaker based in Biel/Bienne, Switzerland. Britain's Royal Flying Corps chose Omega watches in 1917 as its official timekeepers for its combat units, as did the American army in 1918. Omega watches were the choice of NASA and the first watch on the Moon in 1969. Omega has been the official timekeeping device of the Olympic Games since 1932.