1. THE COLLECTION CONSTELLATION 160 YEARS Steel on steel MOVEMENT Caliber Omega 2500 Self winding chronometer Co Axial Escapement movement with rhodium plated finish Power reserve 48 hours CRYSTAL Domed scratch resistant sapphire crystal with anti reflective treatment inside rer 111 10 36 20 52 001 CASE amp DIAL Case Steel Case Diameter 35 5 mm Dial Silver with diamonds WATER RESISTANCE 5 bar 50 metres 167 feet FEATURES Date Diamonds Chronometer Transparent case back www omegawatches com