Features: Hours, minutes & central hacking seconds Glass secured against displacement by drop in air pressureSapphire glass, convex, antireflective coating on both sidesIWC bracelet quick-change systemPellaton automatic windingCentral hacking secondsSpecifications: Movement: IWC-manufacturered Automatic 82100 CalibrePower Reserve: 60 hoursFrequency: 28,800 vph (4.0 hz) Jewels: 22Water Resistance: 10 bar / 100 meters Case: Material: Stainless steel Diameter: 43 mm Height: 13.6 mm Caseback: Closed with Le Petit Prince engraving Crown: Screw in crownCrystal: See-through sapphire glass backDial: Design: Blue dial with luminescenceHands: White tone hands with luminescence Markers: White tone arabic numerals markers with luminescence Band: Blue calfskin strap with EasX-CHANGE systemStrap width 21.0 mm