Omega Ladies Constellation Chronometer Watch - 27 mm Brushed Red Gold Case - Diamond Bezel - Mother-Of-Pearl Supernova Diamond Dial - 123.55.27.20.55.00127 mm brushed 18K red gold case, transparent back, diamond bezel, domed scratch resistant sapphire crystal with anti reflective treatment both sides, white mother of pearl supernova dial with diamond hour markers, self winding chronometer Omega 8521 movement with Co Axial Escapement, date, and seconds, approximately 50 hours of power reserve, 18K red gold bracelet. Water resistant to 100 m.