Speedmaster

Omega’s chronographChronographA watch function for starting, stopping and resetting an elapsed-time measurement independently of the ordinary time display., launched in 1957 as a sports and racing watch and the first with a tachymetreTachymeterA chronograph scale that converts the time taken to travel a known distance into average speed. The distance and scale units must correspond. on the bezelBezelThe frame surrounding the crystal at the front of a watch.. Flight-qualified by NASA in 1965, it was worn on the Moon in 1969 and has been made continuously since.