Omega De Ville Tresor Omega Co-Axial Master Chronometer - 40 mm Steel Case - Blue Patterned Dial - Blue Leather Strap - 435.13.40.21.03.00140 mm steel case with anti magnetic protection, transparent back, scratch resistant sapphire crystal with anti reflective treatment on both sides, domed blue patterned dial with a date window at 6 oclock as well as hands and indexes in 18K white gold, Calibre Omega 8910 manual winding co axial master chronometer movement with date, approximately 72 hours of power reserve, blue leather strap. Water resistant to 30 metres (100 feet).