The 5271/13P-001 is among the rarest expressions of Patek Philippe's Grand Complications collection, an off-catalogue perpetual calendar chronograph in platinum, set with 58 baguette-cut emeralds on the bezel and a single emerald at twelve o'clock. The hand-wound Calibre CH 29-535 PS Q delivers perpetual calendar, chronograph, and moon phase through one of the most technically accomplished movements in current production, with a 65-hour power reserve. At 41mm and 12.7mm thick, it wears with the authority its complications demand. Introduced at Baselworld 2017, this is a piece produced in extremely limited numbers and seldom seen on the open market. Brand: Patek Philippe Reference: 5271/13P-001 Year: 2017 Condition: Like new Comes with: Complete set — box, papers, accessories Every piece we list has undergone a multi-point inspection by our in-house specialists, covering movement condition, originality of parts, prior polishing, timing performance, and pressure integrity. Only pieces that meet our criteria for authenticity and preservation make it to the site. Shipments are handled exclusively through fully insured, door-to-door transport via Malca-Amit and Ferrari Logistics, with full documentation confirming insurance coverage, declared value, and chain of custody on every order. We ship to clients across the UK, Europe, the Middle East, Asia, and North America. Every watch sold comes with an 18-month mechanical warranty. If you're searching for a reference not currently listed, our sourcing team operates across a global network of private collectors, dealers, retailer relationships and can often locate a piece before it reaches the open market. Enquiries are handled directly by our team, not an automated system. Visit us at our newly opened showroom in Wilmslow, Cheshire — a private, appointment-based space where clients can view and try pieces in person. To arrange a visit, contact us directly.