The Audemars Piguet Royal Oak "Jumbo" Extra-Thin Yellow Gold Blue Dial 39mm Ref. 15202BA.OO.1240BA.01 is a standout in the Royal Oak line, combining classic proportions with full 18-carat yellow gold construction. Measuring 39mm across and just 8.1mm thick, this model features a glareproof sapphire crystal and caseback, ensuring durability and clear visibility of the blue “Petite Tapisserie” dial. Yellow gold applied hour markers and Royal Oak hands with luminescent coating enhance legibility, while the integrated yellow gold bracelet and AP folding clasp provide a secure, comfortable fit. Powered by the ultra-thin selfwinding Calibre AP 2121, the watch offers a 40-hour power reserve and reliable date function. Water resistance is rated to 50 meters, supporting versatile wear. Notable features include the solid yellow gold case and bracelet, extra-thin profile, and signature patterned dial, making this Royal Oak "Jumbo" an essential choice for collectors seeking iconic design and precious metal execution.