Audemars Piguet Royal Oak Perpetual Calendar 26574ST Review

THE FIRST LOOK

Audemars Piguet Royal Oak 26574ST First Impressions

What hits you the moment you pick up the 26574ST.

The Audemars Piguet Royal Oak Perpetual Calendar 26574ST surprises you with what it does not do. It does not feel heavy, it does not feel precious, and it does not announce that there is a perpetual calendar inside. Hand someone the Audemars Piguet Royal Oak 26574ST without telling them what it is and they read it as a steel sports watch. The case is 9.5mm thick, which is thinner than most three-hand divers, and the first physical reaction is almost always the same: people turn it sideways to check that the number is real. Across the Audemars Piguet watches we handle, nothing else compresses this much mechanical content into this little vertical space.

The second impression is dial density. Four subdials, a leap year window, an astronomical moonphase and a 52-week scale running around the rim should look like a cluttered instrument panel. Under angled light the Grande Tapisserie squares break the surface into thousands of tiny reflections, and the subdial rings sit slightly recessed, so the eye separates the layers instead of fighting them. Photographs flatten this completely. In person the 26574ST reads as calm, which is the whole trick of the watch.

THE WEARING EXPERIENCE

How the Audemars Piguet Royal Oak 26574ST Wears

Wrist presence, weight and cuff clearance on the 41mm steel 26574ST.

The Audemars Piguet Royal Oak 26574ST wears smaller than 41mm because the integrated bracelet starts curving down almost immediately at the case flanks. Lug-to-lug lands near 47mm, so it sits flat on a 6.5-inch wrist and still looks proportional at 7.5 inches. The limiting factor is bezel width rather than diameter: the octagonal bezel pushes the visual footprint outward, so anyone under about 6.25 inches should try one before committing. At roughly 165 grams it is noticeably lighter than a full gold Royal Oak and about level with a steel sports chronograph, with the weight sitting low and evenly rather than pulling to one side.

Cuff clearance is where this reference separates itself. At 9.5mm the 26574ST slides under a buttoned shirt cuff without catching, something the 11mm-plus Audemars Piguet Royal Oak Chronograph cannot claim. Over a full day the only friction point is the clasp, which has no micro-adjustment at all. Size the bracelet in the afternoon when your wrist has expanded, because a half-link either way is the difference between comfortable and slightly wrong, and there is no on-the-fly correction available.

SHOP THIS WATCH

Shop the Royal Oak Perpetual Calendar

Browse authenticated Audemars Piguet Royal Oak Perpetual Calendar watches available now at WatchGuys.

If a 9.5mm steel perpetual calendar sounds like the right fit, here is what we currently have available. Every example ships authenticated by our watchmakers and backed by the WatchGuys 2 Year Warranty.

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BUILD QUALITY

Audemars Piguet Royal Oak 26574ST Specifications

Case, dial and bracelet on the 26574ST, evaluated up close.

Case

The Audemars Piguet Royal Oak 26574ST case is 41mm of steel finished to a standard that still embarrasses most of the industry. Wide satin-brushed top surfaces run in one direction, interrupted by mirror-polished chamfers that stay perfectly even in width from the bezel down to the bracelet junction. Hold it under a point light and the polished bevels throw a single clean line with no ripple, which is the tell for hand finishing rather than machine polishing. The screw-down crown is small and deliberately understated, with a firm, short unscrew action.

Two practical notes. Water resistance is only 20 meters, and the reason is visible on the case flanks: the recessed corrector ports needed to set the calendar. Treat this as a splash-resistant watch, not a swimming watch. The sapphire caseback is well integrated and sits flush enough that it never catches on a shirt sleeve.

Dial and Bezel

The 26574ST dial is where the reference earns its money. The Grande Tapisserie pattern is stamped at a larger scale than the tapisserie on smaller Royal Oaks, which keeps the field legible under four calendar registers. White gold applied markers and hands hold their edges cleanly, the astronomical moonphase at six o'clock is rendered with real depth rather than a flat printed disc, and the 52-week scale sits on the inner bezel ring where it stays out of the way until you look for it. Three steel executions exist: the .01 with a silver-toned dial, the .02 with a blue dial and blue inner bezel, and the later .03 with blue counters in the Night Blue, Cloud 50 tone. The silver dial is the easier daily wearer, the blue dials carry more presence.

The octagonal bezel with its eight white gold hexagonal screws is fixed, thin, and mostly polished, which is what keeps the total thickness so low. Legibility in low light is the one honest weakness. The luminescent coating on the hands and markers is adequate rather than strong, and none of the calendar indications are lumed at all.

Bracelet and Clasp

The integrated bracelet is the reason a Royal Oak feels the way it does, and on the 26574ST it tapers steadily from the case to a comparatively slim clasp. Articulation is excellent, with each link pivoting freely enough that the bracelet drapes rather than hinges in blocks. Polished center links flanked by brushed outer links carry the same finishing discipline as the case.

The AP folding clasp is secure and low profile, but it offers no micro-adjustment and no extension, which is a real gap at this price when a modern Rolex clasp handles the same job in one click. Pre-owned buyers should check bracelet stretch by holding the watch horizontally and watching for sag between the links closest to the case. Stretch is the most common wear point on a well-worn 26574ST and it is expensive to correct.

EXPERT TIP | Robertino Altieri | WatchGuys CEO

What to Check on a Pre-Owned 26574ST

"Look at the bevels first. A 26574ST that has been polished by someone who was not trained on Royal Oaks loses the sharp line between the brushed top and the polished chamfer, and once that line is soft it never comes back. Then check the corrector ports for tool marks. Scratched ports tell me the previous owner was setting the calendar carelessly, and that same carelessness usually shows up inside the movement. Bracelet stretch and case sharpness are what separate a $100,000 example from a $120,000 example."

UNDER THE HOOD

Audemars Piguet Royal Oak 26574ST Movement Review

How the movement performs where it matters: on the wrist, every day.

The Audemars Piguet Royal Oak 26574ST runs the Caliber 5134, a self-winding perpetual calendar built in 2015 to fill the larger 41mm case. It beats at a leisurely 2.75 Hz, carries 38 jewels across 374 components, and measures 4.31mm thick, which is the number that makes the 9.5mm case possible. Audemars Piguet does not chase COSC certification here, and in practice well-serviced examples we handle run within a few seconds a day either side of perfect. The real-world limitation is the 40-hour power reserve. Take the 26574ST off on Friday evening and it will be stopped by Sunday morning, which on a perpetual calendar means a setting session rather than a quick time correction.

Winding through the crown is smooth with light resistance and no grittiness, and the gold rotor is quiet enough that you only hear it if you shake the watch deliberately. Through the sapphire caseback the 5134 is properly decorated rather than merely tidy: circular Cotes de Geneve on the bridges, perlage on the base plate, polished screw heads and a hand-chamfered rotor bearing the AP signature. It does not reach the anglage standard of a hand-finished independent, and at this price that is a fair criticism, but the architecture is honest and the calendar works are visible enough to reward a look.

EXPERT TIP | Robertino Altieri | WatchGuys CEO

Service Costs for the Caliber 5134

"Budget $3,000 to $6,000 for a full service on a 5134 and expect Audemars Piguet to hold the watch for months, not weeks. That is the number most first-time buyers do not factor in. Ask any seller for the service history in writing, and if a 26574ST has never been touched in ten years, treat a service as part of your purchase price. A watch with a recent AP service receipt is worth paying up for."

THE COMPLICATION

Setting the Audemars Piguet Royal Oak 26574ST Calendar

Living with a pin-tool perpetual calendar in 2026.

The Audemars Piguet Royal Oak 26574ST sets its calendar the traditional way, through four recessed correctors in the case side and the small pin tool that ships with the watch. The sequence matters: wind the movement fully, set the date forward until the day, month and leap year catch up, then set the time. Never touch the correctors while the calendar is engaged in its overnight changeover, roughly between 8pm and 3am, because that is when a slipped pin can shear a lever and turn a routine adjustment into a four-figure repair. Once set, the mechanism runs untouched until February 2100.

In practice this shapes ownership. A 26574ST is happiest either worn most days or parked on a winder, because a stopped watch means fifteen minutes with a pin tool over a soft cloth. The 2025 Caliber 7138 removed this friction entirely with crown-only setting, and anyone who plans to rotate the 26574ST through a large collection should be honest with themselves about how often they want to do this. Anyone who wears one watch for weeks at a time will barely notice.

MARKET VALUE

Audemars Piguet Royal Oak 26574ST Price

What the 26574ST costs right now on the secondary market.

The Audemars Piguet Royal Oak 26574ST trades between roughly $100,000 and $120,000 for a complete set in 2026, against a retail figure near $80,000 that almost nobody can access without an established Audemars Piguet purchase history. That premium is the price of skipping an allocation queue. Where the reference gets interesting is the shape of its chart: up about 62% over five years, but essentially flat over the last twelve months while the broader Royal Oak index climbed. Flat is not weakness here. It is the market digesting the arrival of the Caliber 7138 generation, and it means the entry premium on this reference is the softest it has been in years.

Completeness matters more on a six-figure perpetual calendar than on anything else we sell. Box, papers, the original pin tool and an extract from the archives can swing value by ten thousand dollars or more, and a missing warranty card on a watch this heavily counterfeited is a genuine liability at resale. Buyers cross-shopping gold Audemars Piguet watches should note that steel remains the most liquid configuration in this collection, which also makes it the easiest to exit if you later decide to sell an Audemars Piguet Royal Oak.

HEAD TO HEAD

Audemars Piguet Royal Oak 26574ST Comparison

The 26574ST against the alternatives buyers actually cross-shop.

Audemars Piguet 26574ST vs. Audemars Piguet Royal Oak 26674ST (Caliber 7138)

This is the decision that matters. The 26674ST keeps the same 41mm by 9.5mm steel case but replaces the 5134 with the Caliber 7138, which sets every calendar function through a four-position crown, runs at 4 Hz, holds 55 hours of reserve, and gains 50 meters of water resistance because the corrector ports are gone. It is objectively the better watch to live with. It is also roughly $60,000 more on the secondary market. The 26574ST answer is simple: you are buying the same case, the same bracelet finishing and the same complication for a great deal less money, in exchange for a pin tool and a shorter reserve.

Robertino's Take

"I have sold both, and the 7138 is the better daily watch. Nobody argues that. But I am not paying a $60,000 premium to avoid a pin tool twice a year. The 26574ST is the value play in this entire collection right now, and ten years of sales history back it up. If you are buying one watch to wear and keep, the steel 26574ST is the smarter purchase."

Audemars Piguet 26574ST vs. Audemars Piguet Royal Oak 26579CE (Black Ceramic)

Same Caliber 5134, same case dimensions, completely different watch on the wrist. The Audemars Piguet Royal Oak 26579CE is machined entirely from black ceramic, including the bracelet, and it costs roughly double. What you get for the money is scratch resistance that steel cannot approach and a trophy-watch status that has made it one of the hardest allocations in the industry. What you give up is weight distribution, since ceramic sits differently and the watch feels more monolithic, and the ability to have a bevel refreshed if it does get marked. Buyers drawn to the finish rather than the badge should look at the wider range of ceramic Audemars Piguet watches before committing to the premium.

Audemars Piguet 26574ST vs. Patek Philippe Nautilus 5740/1G (Perpetual Calendar)

The genuine cross-shop at this level is the Patek Philippe Nautilus 5740/1G, the white gold perpetual calendar Nautilus that runs the ultra-thin Caliber 240 Q and measures a remarkable 8.42mm thick. It is the thinner and arguably more refined watch, with a finer level of movement decoration, and it costs substantially more while wearing as precious metal rather than steel. Vacheron Constantin sits in the same conversation with the Overseas Perpetual Calendar, so serious shoppers should also look at Vacheron Constantin watches before deciding. The 26574ST wins on daily practicality: steel takes knocks, the Grande Tapisserie dial hides them, and no one panics when it touches a desk edge.

THE BOTTOM LINE

Is the Audemars Piguet Royal Oak 26574ST Worth It?

Our verdict on the steel 26574ST at 2026 money.

Yes. The Audemars Piguet Royal Oak 26574ST is worth buying, and at current pricing it is the most rational entry into one of the great complicated watches of the modern era. It is perfect for the collector who wants genuine horological content without a dress-watch compromise, who wears one watch consistently rather than rotating through six, and who values a 9.5mm case they can forget about under a cuff.

Skip it if you rotate watches weekly, because a 40-hour reserve and pin-tool correctors will wear on you fast, or if you want to swim in it, since 20 meters means splashes only. Those buyers should pay up for the 26674ST and its crown-set Caliber 7138. The single strongest reason to buy the 26574ST is that nothing else puts a full perpetual calendar, this level of case finishing and a genuinely wearable steel sports case together at anything near this number.

Robertino's Take

"The 26574ST is the watch I point serious collectors toward when they tell me they want an AP that means something. It is not the newest and it is not the loudest. It is the one that still gets picked up first when it is sitting on the counter next to a ceramic. Buy a complete set, check the bevels, and stop watching the chart."

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