Brand New Authentic Omega Constellation Co-Axial Master Chronometer Champagne Dial Yellow Gold Brown Leather Strap Men’s Watch Model 131.53.39.20.08.001. Yellow Gold case with Brown Leather with Rubber Lining strap. Tang clasp. Fixed bezel. Dial description: Yellow Gold hands and Index hour markers with minute markers around the outer rim on a Champagne dial. Automatic Chronometer movement. Powered by Omega Calibre 8801 engine with 55 hours power reserve. Watch functions: Date, Power Reserve, Hour, Minute, Second. Scratch Resistant Sapphire crystal. Round case shape. Case size: 39mm. Transparent case back. 50 Meters – 165 Feet water resistant. 5 year WatchMaxx warranty. Also known as model: 13153392008001.