The Heuer 502.902 Chronometer is a handheld mechanical chronometer produced in the 1970s.
It measures time up to 30 minutes, and is accurate down to a 10th of a second. The central hand runs a complete loop in 30 seconds.
The Chronometer 502.902 has a swiss made handwound movement with 7 jewels, and features a flyback function. It has a black fiberglass case, and a hesalite crystal. The movement features an unbreakable mainspring, is shock resistant, and antimagnetic.
The item listed here is new old stock and in near perfect condition.