Patek Philippe offers a unique interpretation of the perpetual calendar, showcasing a retrograde date hand in a new white gold design that exudes a modern and original style. The dial, crafted from gray metallized sapphire crystal, provides a glimpse into the watch's intricate mechanical workings. A gray electroplated outline highlights the retrograde date hand, as well as the day (at 9 o'clock), month (at 3 o'clock), leap-year cycle (at 12 o'clock), and moon phases (at 6 o'clock) apertures. The iconic hobnail pattern is featured on the bezel and caseback, adding to the distinguished Patek Philippe aesthetic. The self-winding mechanical movement, caliber 26-330 S QR, powers the perpetual calendar with retrograde date hand, day, month, leap year, and moon phases. The stunning dial is made of sapphire crystal with a gray metallized finish and a black-gradient rim, adorned with white