MOVEMENT Caliber Breitling 77 Movement SuperQuartz™, thermocompensated quartz electronic, EOL indicator Calendar Dial aperture Battery type/life Approx. 3 to 4 years CASE Case material Stainless Steel Caseback Screwed in Water resistance 100 m (330 ft) Bezel Fixed Crown Non screw-locked, two gaskets Crystal Cambered sapphire, glareproofed both sides DIMENSIONS Product Weight (Approx.) 85.0 g. Watch-head Weight (Approx.) 31.4 g. Diameter 32.0 mm Thickness 8.5 mm Height (upper lug tip to lower lug tip) 39.4 mm Lug width (in-between lug) 16.0 mm STRAP Strap material Stainless Steel Strap color Metal Bracelet Strap type Straight Lug 16/16 mm