Patek Philippe 5236P (New with box and papers) — USD 103,999 on eBay

The Complications reference 5236P is notable for its in-line perpetual calendar display, a distinctive arrangement that presents the day, date, and month in a single aperture at 12 o'clock. This design choice offers a clean and highly legible presentation of complex calendar information, differentiating it from other perpetual calendar models that typically use multiple subdials. Introduced in 2021, this reference quickly became a point of interest for collectors seeking innovative calendar displays within a classic Patek Philippe framework. Crafted in platinum, the case of the 5236P measures 41.3mm in diameter and houses the self-winding caliber 31-260 PS QL. This movement is equipped with a platinum micro-rotor and operates at a frequency of 4 Hz, providing a power reserve of approximately 38 to 48 hours. The watch features a sapphire crystal on both the front and the exhibition case back, allowing for a view of the meticulously finished movement. This reference appeals to collectors who appreciate technical innovation combined with traditional watchmaking artistry. Its unique in-line perpetual calendar display represents a significant development in the brand's perpetual calendar offerings. The 5236P fits into the Complications collection as a sophisticated and technically advanced timepiece, appealing to those who value both mechanical ingenuity and refined aesthetics.