The Omega Constellation Day-Date (Ref. 168.019) is a highly regarded vintage chronometer from the late 1960s. This specific configuration, featuring an 18k white gold bezel and the Caliber 751 movement, is often considered an "apex reference" for the line due to its rare materials and high-precision engineering.

• Case: 35mm "C-shape" design, originally designed by legendary watchmaker Gerald Genta.

• Bezel: Distinctive fluted or "coin-edge" bezel crafted from 18k white gold.

• Movement: Caliber 751, an automatic chronometer-certified movement with 24 jewels and a 50-hour power reserve.

• Functions: Features both day and date complications; notably, the date has a "quick-set" function operated by pulling the crown repeatedly, while the day is typically changed manually.

• Dial: Frequently found with a "linen" texture and the iconic applied star logo.

• Case Back: Features the Geneva Observatory emblem with eight stars, representing Omega’s precision records.