Omega De Ville Prestige Co-Axial 25th Anniversary Prestige - 39.5 mm Sedna Gold Case - Silver Dial - Brown Leather Strap - 424.53.40.20.99.00139. 5 mm sedna gold case, domed scratch resistant sapphire crystal with anti reflective treatment on both sides, grain structured silver dial to add an earthy texture to the models minimalist look, Calibre Omega 2500 self winding co axial chronometer movement with date, approximately 48 hours of power reserve, brown leather strap. Water resistant to 30 metres (100 feet).