IWC Schaffhausen Big Pilot's Watch Perpetual Calendar Tourbillon Edition "Le Petit Prince"

The IWC Big Pilot's Watch Perpetual Calendar Tourbillon Edition "Le Petit Prince", reference IW504803, has a 46.2 mm 18-carat Armor Gold case. This special edition has a perpetual calendar; at 16 mm thick, the case has a screw-down crown. Self-winding calibre 51950 has a 168-hour power reserve and 54 jewels. The blue dial, covered by convex sapphire glass, has a day and date display, a power reserve indicator and a moon phase display. The watch is on a brown calf leather strap. The case's water-resistance rating is 100 metres. A see-through case back gives a view of the movement.