IWC Big Pilot's Watch Perpetual Calendar Edition ''Le Petit Prince'' Reference: IW502802 Power reserve: 7 daysLimited edition: 270 pieces IWC Schaffhausen celebrates the 70th birthday of the highly popular novella “The Little Prince” with the launch of two limited special editions: the Big Pilot’s Watch Perpetual Calendar Edition “Le Petit Prince” and the Pilot’s Watch MarkXVII Edition “Le Petit Prince”. With these, the Swiss watch manufacturer pays tribute to one of the best-selling books in literary history, written by legendary writer, pilot and adventurer Antoine de Saint-Exupéry.