The Omega Constellation Reference 168.010/11 (the joint reference stamp typically found inside the caseback) is a highly collectible vintage chronometer from the late 1960s. When executed in solid 18k Yellow Gold with a Champagne Diamond Dial, it represents an ultra-luxurious, top-tier configuration often historically referred to as a "De Luxe" edition. 

While listings frequently generalize these vintage cases as 34mm, the official Omega specification for this round, elegant Gerald Genta-designed case is 35mm in diameter (excluding the crown).

• Brand & Line: Omega Constellation Chronometer

• Reference Number: 168.010 / 168.011 (commonly stamped together inside the caseback)

• Case Dimensions: 35mm diameter (excluding crown) x 40mm lug-to-lug with a 19mm lug width.

• Case Material: Solid 18k Yellow Gold with the iconic 8-star Observatory medallion on the screw-down caseback.

• Movement: Automatic Caliber 564 (featuring a high-grade 24-jewel chronometer cert and a convenient push-pull quickset date mechanism).

• Dial: Champagne/Gold sunburst finish. Dial designs under this dual reference vary between perfectly flat dials and the legendary 12-sided "Pie Pan" shape.

• Hour Markers: Factory or period-professional Diamond indices instead of standard metal or onyx baton inserts.