The Patek Philippe Grand Complications 5270P-015 comes as a platinum version of the perpetual calendar chronograph 5270, combining the established case architecture of the model with a sunburst lacquered charcoal grey dial and black-gradient rim. This reference retains the standard display layout of the 5270 while differing from adjacent platinum variants through its dial finish and strap details.
Its case is crafted in platinum and measures 41 mm in diameter with a thickness of 12.4 mm. The watch is fitted with a concave bezel and two-tier lugs, and, as is customary for platinum Patek Philippe references, the case is set with a diamond at 6 o’clock. A sapphire crystal case back reveals the movement, and water resistance is rated to 30 meters.
The dial is executed in sunburst lacquered charcoal grey with a black-gradient rim. White gold applied faceted obus-style hour markers and white gold faceted dauphine-style hands are paired with a white printed tachymeter scale. The calendar and chronograph indications follow the established 5270 arrangement, with the day and month shown in a double aperture at 12 o’clock, day/night and leap year indications displayed in round apertures, and the date indicated by hand together with the moon-phase display at 6 o’clock. The chronograph indications include a central chronograph hand, an instantaneous 30-minute counter, and small seconds.
Inside is the manually wound Patek Philippe calibre CH 29-535 PS Q, a chronograph movement with perpetual calendar. The movement combines traditional chronograph construction with six patented chronograph-related innovations and measures 32 mm in diameter with a thickness of 7.00 mm. It consists of 456 parts, uses 33 jewels, and operates at 28,800 semi-oscillations per hour. The power reserve, with the chronograph disengaged, ranges from a minimum of 55 hours to a maximum of 65 hours. The movement uses a Breguet balance spring and bears the Patek Philippe Seal.
The watch is fitted with a black composite strap with a fabric pattern and contrasting cream stitching, secured by a platinum fold-over clasp. This strap configuration forms part of the reference’s specification within the 5270 line, together with the charcoal grey lacquered dial and platinum case.
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