Pilot's Watch Chronograph Edition "Tophatters"The Pilots range of IWC Schaffhausen watches was designed to meet the complex demands of timekeeping in the sky. While its inner mechanism ensures precision to the exact second, its comfortable strap and chic design make it the ideal fashion item. CASE Ceramic case Diameter 44. 5 mm Height 15. 7 mm Screw in crown Water resistance 6 bar MOVEMENT 69380 Caliber IWC manufactured movementAutomatic, self winding 46 hours Power Reserve Frequency 28800. 0 vph