This vintage Audemars Piguet Royal Oak Jumbo Ref. 5402 “A-Series” is one of the most iconic and historically important luxury sports watches ever produced. Crafted in stainless steel, its slim 39 mm octagonal case features the original exposed screws and brushed finish that defined Gérald Genta’s revolutionary design of 1972. The legendary “Petite Tapisserie” blue dial is adorned with applied white gold baton markers and slender hands, offering exceptional legibility and elegance. Powered by the ultra-thin Caliber 2121 automatic movement, renowned for its precision and refined architecture, this early A-Series example represents the very first generation of the Royal Oak. The watch is fitted with its original Gay Frères integrated steel bracelet, perfectly balanced and highly collectible. A true grail for connoisseurs, the Ref. 5402 A-Series embodies innovation, rarity, and timeless sophistication — a cornerstone of modern watchmaking history.