PILOT'S WATCH CHRONOGRAPH 41 CASE: Bronze case,?Diameter 41.0 mm,?Height 14.5 mm,?Screw-in crown,?See-through sapphire glass back,?Water resistance 10 bar,?MOVEMENT:?69385 Calibre,?IWC-manufactured movement,?Automatic, self-winding,?46 hours Power Reserve,?Frequency 28800.0 vph (4.0 hz),?231 Components,?33 Jewels,?FEATURES:?Chronograph function with hours, minutes and seconds,?Day and date display,?Glass secured against displacement by drop in air pressure,?Sapphire glass, convex, antireflective coating on both sides,?IWC bracelet quick-change system,?Small hacking seconds