The Patek Philippe Grandmaster Chime features a manually wound Caliber 300 GS AL 36‑750 QIS FUS IRM movement in a reversible white gold case. This extraordinary timepiece includes a grande and petite sonnerie, a minute repeater with classic gongs, and a range of complications such as an instantaneous perpetual calendar, dual time zones, moon phases, and a date repeater. The ebony black opaline dials showcase gold-applied Breguet numerals and a hand-guilloched hobnail pattern. Adorned with 96 baguette-cut sapphires (10.8 ct) and 291 baguette-cut diamonds (20.54 ct), it measures 49.4 mm in diameter and 16.32 mm in height. The watch is completed with a shiny black alligator leather strap and a fold-over clasp set with sapphires.