Omega De Ville Tresor Master Co-Axial Watch - 40 mm Yellow Gold Case - Diamond-Set Bezel - Domed Mother-Of-Pearl Dial - Red Leather Strap - 432.58.40.21.05.00440 mm 18K yellow gold case, transparent back, diamond set bezel, scratch resistant sapphire crystal anti reflective treatment on both sides, domed white mother of pearl dial with polished 18K gold hands and a date window at 6 o'clock, Caliber Omega 8511 manual winding movement with co axial escapement, chronometer, date, approximately 60 hours of power reserve, red leather strap. Water resistant to 3 bar (30 metres 100 feet).