Omega Constellation (1952)Omega began using the name “Constellation” in 1952 to denote its officially certified wrist chronometers. The premier model was powered by Caliber 28.10 RA SC PC RG AM (nicknamed the “352”), which first appeared in 1945. This caliber wound itself via a unidirectional hammer-type winding weight. It also featured an indirectly propelled central seconds hand. The 28.1-mm-diameter, 5.4-mm-thick movement passed the official chronometer tests with flying colors. Its sturdiness, reliability and precision prompted Omega to produce the Constellation in large numbers. This model was also Omega’s first serially manufactured wristwatch .
