This Royal Oak ranks among the most lavishly conceived expressions of the model, fusing three of Audemars Piguet's signature achievements within a single 37mm reference introduced in 2019. The frosted gold finish — developed with Florentine jewelry designer Carolina Bucci, hammering the surface to scatter light like diamond dust — meets a rainbow bezel of individually cut sapphires and the patented Double Balance Wheel mechanism. That innovation, employing two balance wheels and springs on a single axis, enhances stability and precision while remaining visible on the openworked dial. The convergence of high jewelry, artisanal finishing, and genuine horological advancement makes this among the most visually arresting Royal Oaks ever produced.

The 37mm case in hammered 18-karat white gold carries an octagonal bezel set with 32 baguette-cut rainbow-colored sapphires totaling 2.24 carats. The rhodium-toned openworked dial reveals the movement architecture beneath, accented by pink gold applied hour markers and luminescent Royal Oak hands, with the double balance wheel displayed at eight o'clock. The self-winding in-house Caliber 3132, comprising 245 components, delivers a 45-hour power reserve and is visible through the sapphire caseback. A hammered white gold Royal Oak bracelet with AP folding clasp completes the watch.