Patek Philippe 5140P-001 (New with box and papers) — USD 71,395 on eBay

The Patek Philippe Grand Complications reference 5140P-001 is a perpetual calendar wristwatch, introduced in 2006 as a successor to the long-running reference 3940. This model updates the classic perpetual calendar design with a slightly larger case and a refined aesthetic, while retaining the core functionality and understated elegance characteristic of Patek Philippe's perpetual calendars. The 5140 series is distinguished by its contemporary proportions compared to its predecessor. This specific reference, the 5140P-001, features a platinum case. It is powered by the self-winding caliber 240 Q, an ultra-thin movement known for its micro-rotor construction, which allows for a slender case profile. The watch is fitted with a sapphire crystal on the front, providing clear visibility of the dial, and often includes a sapphire case back to view the movement. The 5140P-001 appeals to collectors seeking a modern interpretation of a traditional complication from Patek Philippe. Its platinum case signifies a premium offering within the Grand Complications line. The model continued the legacy of the 3940, offering a slightly updated presence on the wrist while maintaining the technical sophistication and design language expected from the manufacture.