Caliber Breitling B12 (Manufacture) / Breitling 01 (Manufacture) Movement Selfwinding mechanical Power reserve Min. 70 hrs Chronograph 1/4th second, 30 minutes, 12 hours Vibration 28,800 v.p.h Jewel 47 jewels Calendar Dial aperture Case Breitlight? Back With screws Water resistance 100 m (330 ft) Bezel Unidirectional, ratcheted Crown Screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides Diameter 50.00 mm Strap Diver Pro, Military or Military Rubber Interhorn width 24/20 mm Thickness 16.97 mm Weight (without strap) 68.92 gr.