MOVEMENT Caliber Breitling 13 Movement self-winding mechanical Power reserve approx. 48 hrs Chronograph 1/4th second, 30 minutes, 12 hours Vibration 28,800 v.p.h Jewel 25 jewels Calendar Dial aperture CASE Case material Stainless Steel Caseback Screwed in Water resistance 200 m (660 ft) Bezel Unidirectional, ratcheted Crown Screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Watch-head Weight (Approx.) 136.5 g. Diameter 42.0 mm Thickness 15.2 mm Height (upper lug tip to lower lug tip) 51.6 mm Lug width (in-between lug) 20.0 mm STRAP Strap material Stainless Steel Strap color Metal Bracelet Strap type Straight Lug 20/18 mm