Patek Philippe Grand Complications 5531

Patek Philippe's Grand Complications 5531G-001 is a 40.2 mm white gold GMT watch with a hand-guilloched hobnail case. The case measures 11.49 mm thick and pairs a solid caseback with an interchangeable sapphire crystal version that displays the movement. The dial is a Grand Feu cloisonné enamel scene of a steamboat on Lake Geneva, set on an 18K gold plate with a 24-hour ring. Inside is the self-winding calibre R 27 HU, with 43 hours of power reserve. The watch combines a minute repeater that strikes local time with a world time function showing day and night across all 24 zones. It comes on a blue-green alligator leather strap with a white gold folding clasp. Patek Philippe notes the case resists humidity and dust only, with no water resistance.