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 3 bars Bezel Bidirectional, slide rule Crown Non screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 94.9 g. Watch-head Weight (Approx.) 50.3 g. Diameter 41.0 mm Thickness 10.0 mm Height (upper lug tip to lower lug tip) 47.9 mm Lug width (in-between lug) 22.0 mm STRAP Strap material Stainless steel Strap color Metal bracelet Strap type Straight Lug 22/20 mm