MOVEMENT Caliber Breitling 01 (Manufacture) Movement self-winding mechanical Power reserve approx. 70 hrs Chronograph 1/4th second, 30 minutes Vibration 28,800 v.p.h Jewel 41 jewels Calendar Dial aperture CASE Case material Stainless Steel Caseback Screwed in (sapphire crystal) Water resistance 100 m (330 ft) Crown Non screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 172.1 g. Watch-head Weight (Approx.) 97.7 g. Diameter 42.0 mm Thickness 13.6 mm Height (upper lug tip to lower lug tip) 50.0 mm Lug width (in-between lug) 22.0 mm STRAP Strap material Stainless Steel Strap color Metal Bracelet Strap type Curved Lug 22/20 mm