Features: Chronometer, Date, Helium escape valve, Screw-in crown, Transparent case back, Unidirectional rotating bezel, Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides, Steel Case, Black Dial, 60 bar (600 metres / 2000 feet) Water Resistance, 42 mm Diameter, Omega 8500 Caliber, Self-winding movement with Co-Axial Escapement for greater precision, stability and durability. Free sprung-balance, 2 barrels mounted in series, automatic winding in both directions to reduce winding time. Bridges and the oscillating mass are decorated with exclusive Geneva waves in arabesque.