The Patek Philippe Grandmaster Chime reference 6300/400G-001 is a highly sophisticated Haute Joaillerie timepiece featuring a 49.4mm reversible white gold case. This double-faced model is distinguished by its extensive gem-setting, featuring 409 baguette-cut diamonds totaling approximately 31.35 carats across the case, bezels, and clasp. The watch utilizes an ebony black opaline dial on both sides, with the time side showcasing a hand-guilloched hobnail pattern and white gold applied Breguet numerals. It is paired with a shiny black alligator leather strap and is built with a humidity- and dust-protected case that is not water-resistant.
As the most complicated wristwatch in Patek Philippe’s current collection, the 6300/400G-001 houses 20 distinct complications powered by the manually wound caliber 300 GS AL 36-750 QIS FUS IRM. The acoustic functions are central to its design, including a minute repeater, grande and petite sonnerie, an alarm with time strike, and a patented date repeater. The perpetual calendar functions provide the day, month, date on both dials, leap year cycle, and a four-digit year display, alongside moon phases, a second time zone with day/night indication, and power reserve indicators for both the movement and the strikework.
General reception of the Grandmaster Chime highlights it as a pinnacle of horological engineering and artistic craftsmanship, often described as a mechanical masterpiece. While collectors and enthusiasts praise its unparalleled complexity and the innovation of its chiming mechanisms, practical reviews often note its substantial dimensions, with a diameter of nearly 50mm and a thickness of 16.32mm, which may limit its wearability for many. It is widely regarded more as a significant work of horological art and a collector’s showpiece than a standard daily timepiece.