Audemars Piguet Royal Oak Double Balance Wheel Openworked Buyer's Guide

THE COLLECTION

What Is the Royal Oak Double Balance Wheel Openworked?

Audemars Piguet's most technically ambitious Royal Oak, combining the brand's century-long openworking heritage with a patented dual balance wheel mechanism.

The Royal Oak Double Balance Wheel Openworked is the haute horlogerie flagship of the Audemars Piguet Royal Oak collection. Launched in 2016, it pairs Gerald Genta's legendary octagonal case with Caliber 3132, an openworked self-winding movement featuring two superimposed balance wheels on a single axis. This is not a complication in the traditional sense. It is a fundamental upgrade to the watch's regulating organ, designed to improve chronometric precision and stability while creating one of the most visually captivating movements in modern watchmaking.

The collection spans two case sizes: 41mm (the original format, using reference prefixes 15407, 15412, 15416, and 15417) and 37mm (introduced later, using reference prefix 15467 and 15468/15469 for Frosted Gold and gem-set variants). The 41mm models are offered in stainless steel, 18k rose gold, 18k yellow gold, black ceramic, white ceramic, and the new "Bleu Nuit, Nuage 50" dark blue ceramic. The 37mm models are available in 18k white gold, 18k rose gold, and 18k yellow gold, including Frosted Gold finishes and rainbow gem-set bezels. Every configuration is powered by the same Caliber 3132.

Within the broader Audemars Piguet catalog, the Double Balance Wheel Openworked sits between the standard Royal Oak Selfwinding and the Royal Oak Perpetual Calendar in terms of both complexity and price. It offers genuine horological innovation and visual drama without the functional complexity (or service costs) of a perpetual calendar or minute repeater. For collectors who want a Royal Oak that showcases AP's finishing and engineering at the highest level, this is the model to own.

AT A GLANCE

Audemars Piguet Royal Oak Double Balance Wheel Openworked Review

Everything you need to know before buying an AP Royal Oak Double Balance Wheel Openworked, summarized for buyers short on time.

The Royal Oak Double Balance Wheel Openworked is for the collector who wants more than a luxury sports watch. It is for the buyer who wants to see the craft, who values movement architecture as much as wrist presence, and who appreciates that AP's openworking tradition stretches back to the 1930s.

Introduced at SIHH 2016, the model debuted with the stainless steel 15407ST and the rose gold 15407OR. It was the world's first openworked double balance wheel wristwatch, and it immediately established itself as a collector favorite. The lineup has since expanded to include black ceramic, white ceramic (limited to 30 pieces), the 2025 "Bleu Nuit, Nuage 50" ceramic, yellow gold, Frosted Gold editions, and multiple gem-set high jewelry configurations. A 37mm version arrived in gold and Frosted Gold finishes for collectors who prefer a more compact size.

On the secondary market, the stainless steel 15407ST trades in the range of $130,000 to $200,000, while rose gold models sit around $190,000 to $230,000. Black ceramic 15416CE pieces command $250,000 and up, with limited editions and gem-set variants reaching well into six figures and beyond. The 15407ST has appreciated roughly 48% over the past five years, significantly outperforming both the broader AP index and the overall watch market.

The core decision for most buyers comes down to steel versus ceramic. Steel is the entry point, trades with the most liquidity, and delivers the classic Royal Oak proportions in a familiar material. Ceramic is lighter, virtually scratch-proof, and offers a more modern, stealthy aesthetic that serious collectors gravitate toward. Both are exceptional, but they attract different buyers for different reasons.

Long-term, the Royal Oak Double Balance Wheel Openworked has shown strong value retention across all materials. This is not a trend piece. It is a core Royal Oak model with genuine technical innovation, and the market has rewarded it accordingly. Scroll on for the full breakdown.

HERITAGE

History of the Royal Oak Double Balance Wheel Openworked

From AP's first openworked movements in the 1930s to the cutting-edge Caliber 3132, a timeline of innovation.

The Royal Oak Double Balance Wheel Openworked did not emerge in isolation. It represents the convergence of two long-running Audemars Piguet traditions: the Royal Oak case design and the art of openworking movements. Understanding where this watch came from requires tracing both lineages.

HAUTE HORLOGERIE

Caliber 3132: The Double Balance Wheel Movement

A patented mechanism that exists nowhere else in watchmaking, and the reason this Royal Oak stands apart.

Caliber 3132 is the heart of every Royal Oak Double Balance Wheel Openworked. Developed in-house at AP's Manufacture in Le Brassus, it is an evolution of the well-regarded Caliber 3120 (the workhorse automatic movement used across the standard Royal Oak Selfwinding range) with one critical addition: a second balance wheel.

Most mechanical watches regulate timekeeping with a single balance wheel and hairspring. The balance oscillates back and forth, and the consistency of that oscillation determines the accuracy of the watch. External forces, gravity chief among them, can disturb the balance and introduce positional errors. Audemars Piguet's solution is elegant in concept and extraordinarily complex in execution. Caliber 3132 places two balance wheels on the same axis, stacked vertically at different heights. Each balance wheel has its own hairspring, and the two hairsprings are attached at points 180 degrees apart. This opposed arrangement means the gravitational effects on one balance tend to cancel out the effects on the other, resulting in better overall precision and stability.

This is not the same as a resonance watch (where two balances influence each other acoustically) or a tourbillon (which rotates the entire escapement to average out positional errors). The double balance wheel is a distinct approach, and AP holds the patent on this specific configuration. The two balances are driven by a single escapement, which makes the engineering even more demanding. The combined mass of two balance wheels also improves resistance to external shocks and disturbances.

From a visual standpoint, the double balance wheel assembly is positioned at approximately 8 o'clock on the dial side, creating the collection's most recognizable feature. The twin oscillating wheels are mesmerizing in motion, and their placement opposite the openworked 22-karat gold rotor (visible through the sapphire caseback) creates a compelling front-and-back viewing experience.

Key specifications for Caliber 3132: 26.6mm diameter, 4.4mm thick, 245 components, 38 jewels, 21,600 vibrations per hour (3 Hz frequency), and a 45-hour power reserve. Every bridge and mainplate is openworked using CNC machining and then finished by hand with polished bevels (anglage), straight-grained surfaces, and V-angles that can only be executed manually. The finishing quality is a step above what you will find in the standard Royal Oak Selfwinding, and it should be, because the entire movement is on full display.

EVERY MODEL

Royal Oak Double Balance Wheel Openworked Reference Guide

A complete catalog of every reference in the collection, organized by case size and material.

The Royal Oak Double Balance Wheel Openworked family has grown to over 20 references since 2016. All share the same Caliber 3132 movement but differ in case material, size, dial treatment, and bezel configuration. Below, we break them into two groups: the 41mm models (the original format, and the most collected) and the 37mm models (introduced for collectors who prefer a more compact wrist presence).

41mm References

37mm References

MARKET DATA

How Much Does an AP Royal Oak Double Balance Wheel Openworked Cost?

Current retail and secondary market pricing for the most popular configurations.

The Royal Oak Double Balance Wheel Openworked is a high-horlogerie piece priced accordingly. Retail availability is extremely limited across all materials, and most configurations trade above retail on the secondary market. Below are the current price ranges for the core references that buyers most commonly seek. Gem-set, Frosted Gold, and limited ceramic editions trade at significantly higher premiums and are priced on a case-by-case basis.

Pricing varies based on condition, year of production, included accessories (box, papers, AP warranty card), and the specific dial variant. The 2024 "salmon" toned steel model (15407ST.OO.1220ST.02 with pink gold-toned movement) commands a slight premium over the original grey-toned 15407ST.OO.1220ST.01. Limited edition ceramic models (the 150-piece 15416CE.OO.1225CE.02 and 30-piece white ceramic 15416CB) trade at significant premiums above the standard ceramic pricing.

BUYING CHANNELS

Retail vs. Secondary Market

Two paths to owning a Royal Oak Double Balance Wheel Openworked, and what each one means for you.

Acquiring a Royal Oak Double Balance Wheel Openworked through an Audemars Piguet boutique or authorized dealer is possible in theory but exceptionally difficult in practice. AP operates a strict allocation system, and this model sits in the upper tier of desirability. New clients are unlikely to be offered one without an established purchase history. Many collectors with years-long relationships still wait months or longer for a specific reference.

The secondary market offers immediate access to the full range of references, including discontinued and limited edition models that are no longer available at retail. The tradeoff is price: every standard configuration in this collection trades above retail, and some ceramic and gem-set models trade at two to three times their original retail price. For many buyers, the certainty of getting the exact reference, material, and condition they want is worth the premium.

THE DEBATE

Steel vs. Ceramic: The Core Decision

The most common question buyers face when choosing a Royal Oak Double Balance Wheel Openworked.

For buyers entering the Royal Oak Double Balance Wheel Openworked collection, the first and most consequential decision is material. The gold and gem-set variants occupy their own tier (and price bracket), but the steel 15407ST and the black ceramic 15416CE represent the two main entry paths. They share the same movement, the same case diameter, and the same design language, yet they deliver fundamentally different experiences on the wrist and in the market.

The stainless steel 15407ST is the original, the reference that launched the collection in 2016. It carries the traditional weight and feel of a Royal Oak, with the characteristic brushed-and-polished finishing that has defined the design since 1972. The steel model is the most liquid on the secondary market, meaning it is the easiest to buy and sell. It also represents the lowest financial entry point at roughly $130,000 to $200,000 on the secondary market. For buyers who want the double balance wheel experience in the most classic, versatile format, steel is the pragmatic choice.

The black ceramic 15416CE is the opposite of pragmatic. It is a statement. Ceramic is virtually scratch-proof, noticeably lighter than steel, and offers a depth of finish (the interplay between brushed and polished ceramic surfaces) that metal simply cannot replicate. The finishing process requires approximately five times more labor than a steel case, which is why AP produces fewer ceramic models and why the secondary market prices reflect that scarcity. At $250,000 and up, the ceramic commands a significant premium. But for collectors who have worn both, the ceramic often becomes the one they keep.

NOTABLE EDITIONS

Notable Variants and Editions

From Frosted Gold rainbows to aventurine-dialed limited runs, the collection's standout configurations.

The Royal Oak Double Balance Wheel Openworked does not carry the same kind of collector nicknames as Rolex sport models. Instead, notable variants are distinguished by their materials, limited production numbers, and special design collaborations. Below are the editions that attract the most collector attention beyond the core steel and standard ceramic models.

BUYING CHECKLIST

How to Buy an AP Royal Oak Double Balance Wheel Openworked

Five steps to ensure you make a smart, confident purchase.

• Verify authenticity with a specialist. The Royal Oak Double Balance Wheel Openworked is a high-value target for counterfeiters. The openworked movement is extremely difficult to replicate convincingly, but sophisticated fakes do exist. Always buy from a dealer with in-house watchmakers who can authenticate the Caliber 3132, verify the serial number with AP's records, and confirm that all case and bracelet components are genuine.
• Inspect the movement finishing under magnification. The entire point of an openworked watch is the visible movement. Examine the hand-finished bevels (anglage), the straight-grained surfaces on the bridges, and the V-angle polishing. On a genuine, well-maintained example, these finishes should be crisp and free of tool marks. Any signs of amateur polishing or refinishing on the movement are a red flag.
• Confirm the full set. The secondary market value of this watch is significantly impacted by the presence of the original AP box, warranty card, and accessories. A "full set" in excellent condition will always command a premium over a watch-only sale. Verify that the warranty card matches the serial number engraved on the caseback.
• Check ceramic models carefully for chips. Ceramic is virtually scratch-proof, but it is not chip-proof. Impacts (drops onto hard surfaces, strikes against doorframes) can cause small chips, particularly on the bezel corners and bracelet link edges. Inspect ceramic cases under good lighting and ask for high-resolution photographs of the bezel edges, clasp, and bracelet links before purchasing.
• Understand the service requirements. AP recommends servicing the Royal Oak Double Balance Wheel Openworked every 5 to 8 years. A full service for this caliber is more expensive than a standard Royal Oak service due to the complexity of the double balance wheel assembly and the openworked finishing. Budget $2,000 to $4,000+ for a factory service, and factor the watch's service history into your purchase decision. A recently serviced example is worth a premium.

TECHNICAL DATA

Royal Oak Double Balance Wheel Openworked Specifications

Key specifications for the 41mm stainless steel reference (15407ST), the collection's benchmark configuration.