Movement Caliber Breitling B19 (Manufacture) Movement Automatic winding Power reserve Approx. 96 hours Chronograph 1/4 second, 30 minute counter Vibrations 28,800 vibrations per hour Gemstones 39 jewels Calendar Perpetual calendar with moon phase CASE Case Material 18K red gold Case Back Screwed (sapphire crystal) Water resistance 10 atm Bezel Fixed Crown Unscrew-locked, 2 gaskets Crystal Domed sapphire crystal with anti-reflective coating on both sides Dimensions Product weight (approx.) 145.1 g Watch head weight (approx.) 112.56 g Diameter 42 mm Thickness 15.6 mm Height (from top of lug to bottom of lug) 50.03 mm Lug width (between lugs) 22.05 mm Strap Material Strap material Alligator leather Strap Color Black Strap Type Curved Lugs 22/18 mm Buckle Material 18K red gold Buckle Type Buckle type Buckle Size 18 mm Technical Data Movement Caliber Breitling B19 (Manufacture) Movement Automatic winding Power reserve Approx. 96 hours Chronograph 1/4 second, 30 minute counter Vibrations 28,800 vibrations per hour Gemstones 39 jewels Calendar Perpetual calendar with moon phase CASE Case Material 18K red gold Case Back Screwed (sapphire crystal) Water resistance 10 atm Bezel Fixed Crown Unscrew-locked, 2 gaskets Crystal Domed sapphire crystal with anti-reflective coating on both sides Dimensions Product weight (approx.) 145.1 g Watch head weight (approx.) 112.56 g Diameter 42 mm Thickness 15.6 mm Height (from top of lug to bottom of lug) 50.03 mm Lug width (between lugs) 22.05 mm Strap Material Strap material Alligator leather Strap Color Black Strap Type Curved Lugs 22/18 mm Buckle Material 18K red gold Buckle Type Buckle type Buckle Size 18 mm