MOVEMENT Caliber Breitling 17 Movement self-winding mechanical Power reserve approx. 38 hrs Vibration 28,800 v.p.h Jewel 25 jewels Calendar Dial aperture CASE Case material Stainless Steel Caseback Screwed in Water resistance 500 m (1,650 ft) Bezel Unidirectional, ratcheted Crown Screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 120.0 g. Watch-head Weight (Approx.) 94.4 g. Diameter 42.0 mm Thickness 13.3 mm Height (upper lug tip to lower lug tip) 50.6 mm Lug width (in-between lug) 20.0 mm STRAP Strap material Rubber Strap color Black Strap type Straight Lug 20/18 mm Buckle Material Stainless Steel Buckle type Tang-type Buckle size 18 mm