18ct Rose Gold IWC The Big Pilot’s Watch Perpetual Calendar, Boutique Edition Ltd Edition of 250. Ref: IW502635. Automatic IWC Caliber 51614 movement. Case diameter 46.2mm and 16mm height. Water resistant to 60 meters. Glucydur®* beryllium alloy balance with high-precision adjustment cam on balance arms, Breguet spring, Rotor with 18-carat gold medallion featuring an engraving of the little prince. Power reserve of 7-Days (168 hours) hours. Black dial with Arabic Numeral hour markers. Small hacking seconds, power reserve display, date display, display for day, month, year, and moonphase sequence, rotor with an 18-carat “Probus Scafusia” gold medallion. See-through sapphire-glass back. Black croc leather strap with 18ct buckle. Box and papers dated June 2012. Our reference S20749.