Movement Caliber: Breitling B19 (Manufacture) Movement Type: Self-winding Power Reserve: Approx. 96 hours Chronograph: 1/4-second, 30-minute counter Frequency: 28,800 vibrations per hour Jewels: 39 jewels Calendar: Perpetual calendar with moon phase Case Case Material: 18K red gold Case Back: Screw-down (Sapphire crystal) Water Resistance: 10 bar (100 m / 330 ft) Bezel: Unidirectional ratcheting bezel Crown: Screw-locked, 2 gaskets Dimensions Product Weight (approx.): 239.29 g Watch Head Weight (approx.): 197.83 g Diameter: 44 mm Thickness: 15.35 mm Height (lug to lug): 53.5 mm Lug Width: 22 mm Strap Strap Material: Rubber Strap Color: Black Strap Type: Straight Lug Width: 22/20 mm Buckle Material: 18K red gold Buckle Type: Fold-over clasp Buckle Size: 20 mm