Omega Ladies Constellation Chronometer Watch - 27 mm Brushed Steel And Yellow Gold Case - Diamond Bezel - Mother-Of-Pearl Diamond Dial - 123.25.27.20.55.003 Sodalite interchangeable full and sapphire crystal

interchangeable full and sapphire crystal back

40 mm by 10

caliber 240 Q self-winding movement with perpetual calendar (day

tourbillon carriage and escapement in carbon crystal requiring no regulation or lubrification

Omega Ladies Constellation Chronometer Watch - 27 mm Brushed Steel And Yellow Gold Case - Diamond Bezel - Mother-Of-Pearl Diamond Dial - 123.25.27.20.55.003 Sodalite interchangeable full and sapphire crystal27 mm brushed stainless steel and 18K yellow gold case, transparent back, diamond bezel, domed scratch resistant sapphire crystal with anti reflective treatment both sides, white mother of pearl dial with diamond hour markers, self winding chronometer Omega 8520 movement with Co Axial Escapement, date, and seconds, approximately 50 hours of power reserve, stainless steel and 18K yellow gold bracelet. Water resistant to 100 m.