The Patek Philippe Grandmaster Chime reference 6300/401G-001 is a pinnacle of Haute Horlogerie and Haute Joaillerie, featuring a 49.4mm white gold reversible case. This model is distinguished by its extensive gem-setting, which includes 118 baguette-cut blue sapphires totaling 11.9 carats and 291 baguette-cut diamonds totaling 20.54 carats, applied using an invisible setting technique. The time-side bezel is adorned with blue sapphires, while the calendar-side bezel and case are set with diamonds. The watch is presented on a shiny black alligator leather strap with a fold-over clasp also set with blue sapphires.
At the heart of this timepiece is the manually wound caliber GS AL 36-750 QIS FUS IRM, a movement comprised of 1,366 parts that supports 20 distinct complications. The dual-faced design displays time, a second time zone with day/night indication, and a movement power reserve on one ebony black opaline dial. The second dial displays a full instantaneous perpetual calendar, including the day, date, month, leap year cycle, and a four-digit year display, alongside a moon phase indicator and a strikework power reserve. Its acoustic complications are particularly notable, featuring a grande and petite sonnerie, a minute repeater, a patented date repeater that sounds the date, and an alarm with a time strike.
General reviews of the 6300/401G-001 emphasize its status as a mechanical masterpiece and a significant collector’s item, often highlighting the technical achievement of housing twenty complications within a handheld format. While praised for its unparalleled craftsmanship and the artistic integration of precious stones, the watch is frequently noted for its substantial size and weight, with a thickness of 16.32mm. Experts generally regard it more as a horological objet d’art than a daily wearer, noting that it is humidity and dust protected but lacks water resistance. Its extreme rarity and the requirement of “price on request” reflect its position at the absolute summit of luxury watchmaking.