IWC Pilot's Watch Chronograph Edition "Le Petit Prince" reference IW377717. The Pilot's Watch Chronograph edition "Le Petit Prince" is known for its precision, functionality, and reliability. This watch measures 43 mm in stainless steel and comes on a stainless steel bracelet. The blue dial features white Arabic numerals, month and date display aperture at the 3 o'clock position, chronograph subdials. Houses IWC manufactured manual-winding movement caliber 79320 with a 44 hours power reserve. The stainless steel case back depicts the little prince with his cape and sword. Water resistant to 60 meters.