Audemars Piguet Royal Oak Double Balance Wheel Openworked ‘Rainbow’ – Ref. 15412BA.YG.1224BA.01-B
Unveiled in 2024, the Audemars Piguet Royal Oak Frosted Gold Double Balance Wheel Openworked ‘Rainbow’ (Ref. 15412BA.YG.1224BA.01-B) represents an extraordinary fusion of haute horlogerie, gem-set artistry, and innovative mechanical engineering. Encased in 18‑carat frosted yellow gold with baguette-cut rainbow gemstones and powered by the dual-balance Calibre 3132, this 41 mm masterpiece is a statement of prestige and modern aesthetics.
Case, Bezel & Bracelet
- Material & Finish: Crafted entirely in 18‑carat frosted (hammered) yellow gold, the case and bracelet feature AP’s distinctive sparkling surface treatment. This artisanal technique produces a shimmering, diamond‑like glow.
- Rainbow Baguette Gem‑Set Bezel: The octagonal bezel is elegantly set with 32 baguette-cut multicoloured gemstones, creating a kaleidoscopic play of light that accentuates the watch’s luxurious character.
- Size & Water Resistance: At a commanding 41 mm diameter and approximately 10.1 mm thickness, with 50 m water resistance, the watch balances visual impact with everyday wearability.
Openworked Dial & Hands
The slate-grey openworked dial showcases the mechanics beneath, revealing meticulously finished bridges and gears. Applied yellow-gold hour-markers and Royal Oak hands, filled with luminescent coating, offer legibility and elegance. The skeletonised display highlights AP’s high-end finishing through both the dial and exhibition caseback.
Movement – Calibre 3132 Double Balance Wheel
- Calibre 3132: This state-of-the-art automatic movement features two balance wheels connected via a central differential. Its design enhances precision by reducing positional errors—a true technical innovation. It beats at 3 Hz (21,600 vph) and offers approximately 45 hours of power reserve.
Unique Characteristics
Ref. 15412BA.YG.1224BA.01-B stands out through its combination of avant-garde mechanics, couture finishing, and gemstone artistry:
- The frosted gold technique delivers a dazzling surface that refracts light across the case and bracelet.
- The rainbow baguette bezel infuses vibrant, multicoloured elegance into the iconic Royal Oak silhouette.
- The double-balance wheel mechanism, rarely seen at this scale, represents AP’s commitment to mechanical performance through advanced regulation techniques.
Technical Specifications
- Reference: 15412BA.YG.1224BA.01-B
- Case & Bracelet: 41 mm × ~10.1 mm, frosted 18K yellow gold, 50 m WR
- Bezel: Rainbow baguette-cut gemstone set
- Dial: Slate-grey openworked with luminescent yellow-gold hands and markers
- Movement: Calibre 3132 automatic double-balance; 3 Hz; ~45 h PR; 38 jewels
Collector Appeal & Exclusivity
This bold iteration of the Royal Oak marries visual grandeur with technical sophistication. The frosted gold finish and rainbow bezel create collectible allure, while the double-balance wheel mechanism underscores AP’s mechanical innovation. Ideal for connoisseurs who appreciate high-jewellery finishing and cutting-edge horology in one exceptional statement piece.
Conclusion
The Audemars Piguet Royal Oak Frosted Gold Double Balance Wheel Openworked ‘Rainbow’ Ref. 15412BA.YG.1224BA.01-B is a flagship model in AP’s modern luxury offering. With its innovative movement, gemstone artistry, and prestigious materials, it stands as a true haute horlogerie showcase—designed for those who demand elegance, precision, and spectacle.

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