PATEK PHILIPPE | GRAND COMPLICATIONS, REF.5271/12P-010, A PLATINUM AND BAGUETTE-CUT RUBY-SET PERPETUAL CALENDAR CHRONOGRAPH WRISTWATCH WITH MOON PHASES AND GRADIENT RED DIAL, CIRCA 2023 - FIRST TIME APPEAR IN AUCTION

Footnotes

The Patek Philippe Ref. 5271/12P-010 is a luxurious iteration of the brand's iconic perpetual calendar chronograph lineage, blending high horology with haute joaillerie. Introduced as a jewelry variant of the classic Ref. 5271, it features a striking lacquered red dial with a black-gradient rim, evoking the intensity of rubies that adorn its platinum case. Crafted from 950 platinum, the tonneau-shaped case measures 41 mm in diameter and 12.7 mm thick, offering a substantial yet elegant wrist presence. It achieves 30 meters of water resistance and is finished with a sapphire crystal case back for viewing the movement. The bezel and lugs are set with 58 baguette-cut rubies totaling 4.11 carats, while the platinum fold-over clasp incorporates an additional 22 baguette-cut rubies (1.14 carats), bringing the grand total to 80 rubies weighing 5.25 carats.

A subtle diamond accents the case at 6 o'clock. The dial employs white gold applied "obus"-style hour markers and faceted dauphine hands for legibility, paired with a shiny black alligator leather strap featuring square scales, hand-stitched with contrasting red accents for a cohesive, vibrant aesthetic. At its core is the manually wound Caliber CH 29-535 PS Q, a masterpiece comprising 456 components and 33 jewels. Operating at 4 Hz (28,800 vph) with a Breguet balance spring, it delivers a power reserve of 55–65 hours (chronograph disengaged) and bears the Patek Philippe Seal for exemplary finishing. This integrated complication combines a chronograph, featuring a central seconds hand and instantaneous 30-minute counter, with a perpetual calendar displaying day, month, leap year, and day/night indicators in apertures, plus a date hand and poetic moon phases at 6 o'clock. The small seconds sub dial resides at 9 o'clock, ensuring balanced symmetry.

This reference exemplifies Patek Philippe's fusion of technical precision and gem-set artistry, making it a coveted Grand Complication for collectors seeking both functionality and opulence. Like other jewel-set versions of the Ref. 5271, the ruby-set 5271/12P-010 is produced in very small numbers. These watches are typically reserved for Patek Philippe's most prestigious and established clients and even seeing or handling one in person is a once in a lifetime experience. It is an honor for Bonhams Hong Kong to bring this exceptionally rare and stunning creation from arguably the world's greatest Maison to the public.