Movement Caliber: Breitling 01 (Manufacture) Movement Type: Self-winding Power Reserve: Approx. 70 hours Chronograph: 1/4-second, 30-minute counter, 12-hour counter Frequency: 28,800 vibrations per hour Jewels: 47 jewels Calendar: Date window Case Case Material: Stainless steel & Platinum Case Back: Screw-down (Sapphire crystal) Water Resistance: 20 bar (200 m / 660 ft) Bezel: Unidirectional ratcheting Crown: Screw-locked, 2 gaskets Crystal: Domed, anti-reflective coating on both sides, sapphire crystal Dimensions Product Weight (approx.): 138 g Watch Head Weight (approx.): 108.6 g Diameter: 42 mm Thickness: 15.1 mm Height (lug to lug): 50.5 mm Lug Width: 22 mm Strap Strap Material: Rubber Strap Color: Black Strap Type: Straight Lug Width: 22/20 mm Buckle Material: Stainless steel Buckle Type: Fold-over clasp Buckle Size: 20 mm