The Audemars Piguet Royal Oak Perpetual Calendar 26625BC.ZZ.1223BC.02, an extraordinary special edition that merges high complication watchmaking with full haute joaillerie execution. Crafted in 18k white gold, the 41 mm case, bezel and integrated bracelet are fully set with diamonds, totaling approximately 994 stones and ~9.7 carats, creating an exceptional play of light across the entire watch. The iconic Royal Oak architecture remains intact, with its octagonal bezel and signature finishing elevated by meticulous gem-setting. The watch features a sapphire openworked dial, offering a clear view into the intricate perpetual calendar movement beneath. Pink gold hour markers and Royal Oak hands provide contrast and legibility against the transparent backdrop. At its core is the self-winding Calibre 5135, a highly complex movement displaying day, date, month, leap year, week indication and astronomical moon phase, all engineered to remain accurate without manual correction for decades.