Omega Constellation Co‑Axial Master Chronometer watch 188.8.131.52.63.001.Caliber 8802 automatic movement with a 55 hours power reserve. Incremental diamond hour markers are presented in 18K gold holders. Light chestnut dial, round date window and small seconds display at the 6 o'clock position. 18K Sedna™ gold engraved with Roman numerals set on a 34mm stainless steel case. Sapphire crystal and transparent case back. Water resistant to 50M. Leather strap with folding clasp.