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 200 m (660 ft) Bezel Unidirectional, ratcheted Crown Screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 80.0 g. Watch-head Weight (Approx.) 57.7 g. Diameter 36.0 mm Thickness 11.2 mm Height (upper lug tip to lower lug tip) 43.1 mm Lug width (in-between lug) 18.0 mm STRAP Strap material Rubber Strap color Blue Strap type Straight Lug 18/16 mm Buckle Material Stainless Steel Buckle type Tang-type Buckle size 16 mm