This is Patek Philippe's Grand Complication 5204/1R-001. This model boasts an extremely complex and sophisticated mechanism, featuring a perpetual calendar that automatically corrects for leap years every four years, as well as a split-seconds chronograph that can measure multiple times simultaneously using two chronograph seconds hands. The case and bracelet are generously made of rose gold, highlighting their high quality and elegance. The ebony black dial features three subdials: a chronograph, a perpetual calendar, and a moon phase. There is also a day/night indicator at 8 o'clock and a leap year cycle display at 4 o'clock. Furthermore, the see-through case back allows you to enjoy the precise and beautiful movement of the in-house hand-wound movement, CHR 29-535 PS Q.

Brand: Patek Philippe | Category: Grand Complications | Model: 5204/1R-001 | Dial: Black | Material: 18K Rose Gold | Movement: Cal.CH 29-535 PS Q | Strap: 18K Rose Gold | Case Size: 40.2mm | Functions: Split-second chronograph, day and night indicator, moon phase, perpetual calendar | Waterproof: 3 ATM | Condition: Good | Accessories: Box, guarantee