Omega Seamaster Aqua Terra 150M Co-Axial Master Chronometer Ladies Watch - 38 mm Steel Case - Waved Blue Dial - 220.10.38.20.03.00238 mm stainless steel case, transparent back, domed scratch resistant sapphire crystal anti reflective treatment on both sides, waved blue dial features a date window at 6 oclock, while 18K Sedna gold is used for the hands as well as the indexes, which are shaped like sailboat hulls, Caliber Omega 8800 self winding movement with co axial escapement, chronometer, date, approximately 55 hours of power reserve, stainless steel bracelet. Water resistant