MOVEMENT Calibre: Self-winding chronograph with column wheel and CoAxial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Silicon balance-spring, 2 barrels mounted in series, time zone function. Central hour, minute and chronograph seconds hands, small seconds hand, 12-hour and 60-minute recorders. Rhodium plated finish with Geneva waves in arabesque. Power reserve: 60 hours CRYSTAL Domed scratch-resistant sapphire crystal with antireflective treatment on both sides WATER RESISTANCE 60 bar (600 metres / 2000 feet) WATCH CASE & DIAL Case: Black ceramic Case Diameter: 45.5 mm Between lugs: 22 mm Dial Colour: Black Total product weight (Approx.): 159 g BRACELET Material: Rubber strap Strap color: Black Buckle type: Foldover clasp Buckle material: Ceramic FEATURES Anti-magnetic, chronograph, chronometer, date, master chronometer certified, helium escape valve, screw-in crown, small seconds, unidirectional rotating bezel, time zone function