Omega Constellation Manhattan Co-Axial Master Chronometer Watch - 29 mm Sedna Gold Case - Blue Diamond Dial - 131.50.29.20.53.00129 mm 18K Sedna gold case, transparent back, bezel engraved with Roman numerals, domed scratch resistant sapphire crystal anti reflective treatment on both sides, sun brushed blue dial with diamond hour markers and a date window at the 6 o'clock position, Caliber Omega 8701 self winding movement with co axial escapement, chronometer, date, approximately 50 hours of power reserve, Sedna gold bracelet. Water resistant to 5 bar (50 metres 167 feet).