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 300 m (1,000 ft) Bezel Unidirectional, ratcheted Crown Screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 260.0 g. Watch-head Weight (Approx.) 150.0 g. Diameter 48.0 mm Thickness 17.7 mm Height (upper lug tip to lower lug tip) 60.3 mm Lug width (in-between lug) 24.0 mm STRAP Strap material Stainless Steel Strap color Metal Bracelet Strap type Straight Lug 24/20 mm