In 1884, the International Meridian Conference in Washington, D.C. established the system of standard time and the division of the globe into 24 time zones. And ever since, Patek Philippe’s engineers and watchmakers have been using their ingenuity to produce watches with multiple time zones that are both highly legible and easy to use.
Mechanical self-winding movement. Caliber 240 HU. World Time. 24-hour and day/night indication for the 24 time zones. Bezel set with 62 diamonds (~0.82 ct). Prong buckle set with 27 diamonds (~0.21 ct.). Dial: ivory opaline, hand-guilloched, gold applied hour markers. Case: rose gold. Sapphire-crystal case back. Water resistant to 30 m. Case diameter: 36 mm. Height: 8.83 mm.