Patek Philippe 5140J (Pre-owned - Excellent) — USD 41,999 on eBay

The Grand Complications reference 5140J was introduced in 2006 as a successor to the long-running reference 3940. This model continued Patek Philippe's tradition of ultra-thin perpetual calendars, updating the design language while maintaining the core functionality and technical sophistication that collectors associate with the brand's complicated timepieces. It represents a modernization of a highly regarded perpetual calendar lineage. The 5140J features a yellow gold case, housing the self-winding caliber 240 Q. This movement is known for its slim profile, contributing to the watch's wearable dimensions. The perpetual calendar mechanism displays the day, date, month, leap year cycle, and moon phases, requiring no manual adjustment until the year 2100. The watch is fitted with a sapphire crystal on both the front and an exhibition case back, allowing a view of the finely finished movement. This reference appeals to collectors seeking a contemporary interpretation of a classic Patek Philippe perpetual calendar. It builds upon the legacy of the 3940, offering a slightly larger case diameter that aligns with modern preferences while retaining the understated elegance characteristic of the series. The yellow gold variant provides a traditional aesthetic within the 5140 family.