Omega 564

The Omega Caliber 564 is the officially certified chronometer version of the celebrated 56x family of automatic movements, produced from 1966 to 1969. It shares the same robust architecture and convenient quick-set date mechanism (operated by pumping the crown) as the workhorse Caliber 565. However, the 564 was subjected to more stringent regulation, being adjusted to five positions and temperature to meet COSC standards. This level of precision meant the Caliber 564 was reserved for Omega’s top-of-the-line models, most notably the Constellation, which carried the “Officially Certified Chronometer” text on the dial. The Caliber 564 is often considered one of the finest mass-produced, time-and-date automatic movements of its era, representing a pinnacle of Omega’s mid-century manufacturing prowess.