Constellation 2652 — 2652 SC / 2699, 18k Yellow Gold

Omega 354

Bumper (hammer) automaticAutomaticA mechanical movement wound by a rotor as the watch moves on the wrist. chronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph. of the first Constellations, with an oscillating weightRotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. that swings through part of a turn between buffer springs; preceded by the 351 and 352. Replaced by the full-rotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. 50x family around 1955–56.