Audemars Piguet Royal Oak Double Balance Wheel Openwork 15407ST.OO.1220ST.01 – Stainless Steel Superclone
The Royal Oak Double Balance Wheel Openwork represents Audemars Piguet's mastery of skeletonisation and mechanical innovation. Reference 15407ST.OO.1220ST.01 combines the iconic Royal Oak architecture with a fully openworked movement featuring the brand's patented double balance wheel mechanism—a technical achievement that enhances chronometric precision whilst creating a mesmerising visual spectacle.
Design & Case
The 41mm stainless steel case retains every hallmark of Gerald Genta's 1972 masterpiece: the octagonal bezel with eight exposed hexagonal screws, the integrated bracelet that flows seamlessly from the lugs, and the ultra-thin profile that defines the Royal Oak silhouette. Brushed and polished surfaces are meticulously finished to create the interplay of light and shadow that has made this design a horological icon for over five decades.
Double Balance Wheel Innovation
At the heart of this timepiece lies Audemars Piguet's patented double balance wheel system—two balance wheels mounted on the same axis and connected by a differential mechanism. This ingenious configuration averages out positional errors and external shocks, delivering superior chronometric stability compared to conventional single balance wheel movements. The result is a watch that performs with exceptional accuracy across all wearing positions.
Openwork Architecture
The fully skeletonised dial reveals the intricate mechanics of the automatic movement in stunning detail. Bridges, gears, and the twin balance wheels are visible from both the dial side and exhibition caseback, offering a 360-degree view of haute horlogerie craftsmanship. The openwork treatment removes all non-essential material whilst maintaining structural integrity—a feat of engineering that requires extraordinary precision in design and execution.
Dial & Legibility
Despite the extensive skeletonisation, legibility remains paramount. Applied white gold hour markers and Royal Oak hands with luminescent coating ensure time can be read at a glance, even against the complex backdrop of exposed mechanics. The peripheral chapter ring provides a clean reference for the hours, whilst the openwork centre allows unobstructed views of the double balance wheel mechanism in constant motion.
Movement & Finishing
This superclone faithfully replicates the automatic double balance wheel movement with meticulous attention to finishing. Bridges feature Côtes de Genève decoration, bevelled edges are hand-polished, and circular graining adorns the base plate. The twin balance wheels oscillate in perfect synchronisation, visible through both the dial and sapphire caseback. The movement provides approximately 70 hours of power reserve, with the rotor featuring the AP monogram and openwork design.
Bracelet & Clasp
The integrated stainless steel bracelet is a masterclass in ergonomic design and finishing. Each link combines brushed and polished surfaces in the Royal Oak tradition, tapering elegantly from case to clasp. The AP-signed folding clasp ensures security whilst maintaining the clean lines of the overall design.
Specifications
- Reference: 15407ST.OO.1220ST.01
- Case: 41mm stainless steel with octagonal bezel
- Bracelet: Integrated stainless steel with AP folding clasp
- Dial: Openwork skeletonised with double balance wheel
- Functions: Hours, minutes, double balance wheel mechanism
- Movement: Automatic with double balance wheel, exhibition caseback
- Power Reserve: Approximately 70 hours
- Water Resistance: 50 metres
- Crystal: Sapphire front and exhibition caseback
What's Included
Your Royal Oak Double Balance Wheel Openwork arrives with premium presentation packaging, warranty coverage, and care guidance to preserve the exceptional finishing and mechanical performance of this technical masterpiece.
The Wave Dials Standard
Every watch undergoes rigorous inspection for finishing quality, bracelet articulation, and movement decoration before dispatch. We specialise in premium superclone timepieces that honour the innovation and craftsmanship of the world's most respected manufactures.
The Royal Oak Double Balance Wheel Openwork is a watch for the connoisseur who appreciates both mechanical ingenuity and aesthetic transparency. This is haute horlogerie at its most revealing—where every component serves both function and visual drama, and where technical innovation meets timeless design.
