Constellation 2887 — 2887-2

Omega 505

Full-rotorRotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. 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 50x family that, with the 501, replaced the bumper movementsBumper automaticAn automatic winding system whose pivoting weight travels through a limited arc, meeting spring buffers at the ends of its swing. Wrist motion moves the weight to wind the mainspring. Unlike a full-rotation rotor, the weight cannot turn continuously through 360 degrees; the travel angle varies by design. in Constellations from about 1956; the of the 1950s Grand Luxe.