Audemars Piguet Royal Oak 15407ST.OO.1220ST.01 Double Balance Wheel Stainless Steel Openworked Dial

$164,970.00

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Launched in 2016, the Royal Oak Double Balance Wheel openworked introduced one of Audemars Piguet's most significant mechanical innovations of the modern era. The patented double balance wheel system positions two balance wheels and two hairsprings on the same axis, oscillating in harmony to counteract positional errors and enhance chronometric stability — a genuinely novel departure from centuries of single-balance wheel construction. Reference 15407ST executes this innovation within the iconic 41mm Royal Oak silhouette in stainless steel, distinguished by an openworked dial revealing the entirety of the Caliber 3132 architecture. The visual language combines gunmetal grey bridges with pink gold accents on the applied hour markers and balance bridge, creating a contemporary two-tone aesthetic that has secured this reference's place among the most coveted openworked Royal Oaks in production.

The 41mm case in stainless steel measures just 9.9mm thick, featuring the signature octagonal bezel with eight hexagonal screws, screw-locked crown, and glareproofed sapphire crystal and caseback. The slate grey openworked dial reveals the movement architecture with pink gold applied hour markers and Royal Oak hands with luminescent coating. The in-house self-winding Caliber 3132 — 245 components at just 5.57mm thick with the patented double balance wheel mechanism — delivers a 45-hour power reserve, hand-finished throughout with beveled bridges and polished surfaces, completed by an integrated stainless steel Royal Oak bracelet with AP folding clasp.

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The Audemars Piguet Royal Oak 15407ST.OO.1220ST.01 is a modern masterpiece that showcases the brand’s technical ingenuity and signature design language. Crafted in stainless steel, the 41mm case features the iconic octagonal bezel with exposed screws, satin-brushed finishing, and polished bevels that highlight the architectural form of the Royal Oak. This reference stands out with its openworked dial, offering a captivating view of the intricate inner workings of the selfwinding double balance wheel mechanism.

Introduced as a significant innovation by Audemars Piguet, the double balance wheel system is designed to improve stability and precision. This mechanism is fully visible from both the dial side and the sapphire caseback, allowing collectors to admire the symmetry and complexity of the openworked movement. The layered construction of the bridges and gear train is enhanced by the hand-finished anglage and fine Geneva stripes that demonstrate the maison’s haute horlogerie craftsmanship.

The watch is powered by the Calibre 3132, beating at 3 Hz with a 45-hour power reserve, and is notable for how it fuses mechanical sophistication with an ultra-contemporary aesthetic. The steel integrated bracelet completes the timepiece with a seamless, sculptural flow across the wrist, ensuring both comfort and visual continuity.

Ideal for collectors drawn to mechanical transparency and advanced innovation, the Royal Oak 15407ST.OO.1220ST.01 is a remarkable execution of Audemars Piguet’s tradition of pushing the boundaries of design and technical performance.

Reference Number
15407ST.OO.1220ST.01
Model Family
Royal Oak
Movement
Automatic
Case Material
Stainless Steel
Bracelet Material
Stainless Steel
Dial
Openworked
Case Dimension
41mm
Year
Condition
Pre-Owned (Very Good)
Box & Papers
Original Box, Original Papers

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