Description: Omega Constellation Pre-owned Omega Constellation ref 123.25.27.60.55.007. The Omega Constellation has been around since 1952, originally introduced as a line of precision chronometer watches that showcased the brand’s technical capabilities. Early models were all about observatory-tested accuracy, but by the 1980s, the Constellation took on a more distinct design identity with the introduction of the “Griffes,” or claws, on the case. That design