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Audemars Piguet Royal Oak 37mm Stainless Steel
Ref. 15550ST.OO.1356ST.07
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Stepping up in Audemars Piguet's range
The 15550ST arrived in late 2022 as the successor to the fiftieth-anniversary Royal Oak that had launched earlier that year, inheriting its celebration of Gérald Genta's original 1972 octagonal case while carrying a suite of quiet refinements — wider bevels, more tapered bracelet links, a slightly more integrated relationship between case and band. It is the settled, long-term version of a design that the anniversary model reopened. At 37mm and 9.1mm thick it is genuinely flat for an integrated-bracelet sports watch, which means it passes under a shirt cuff without lifting it and reads as a considered choice rather than an assertion. The grey Grande Tapisserie dial shifts between charcoal and slate depending on where the light falls, and the 18-carat white gold applied indices hold their contrast in either state. The Calibre 5900 — developed specifically to optimise the profile of this mid-size series — runs at 28,800vph across 188 components and offers a 60-hour reserve, so a weekend off the wrist causes no disruption. The lume is a thin coat behind each baton, enough for a darkened room without the bulk that full luminous inserts would add to a dial this refined. Bracelet fit is managed through screw-in links and half-links rather than a push-button clasp adjuster, which rewards a little patience at setup but then settles the watch exactly where it should sit.
- Reference
- 15550ST.OO.1356ST.07
- Brand
- Audemars Piguet
- Case size
- 37mm
- Case thickness
- 9.1mm
- Case material
- Stainless steel
- Case shape
- Octagonal
- Dial
- Grey
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- 5900
- Functions
- Date
- Water resistance
- 50m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Luminous
- Condition
- Pre-owned
- Retailer
- Mappin & Webb
Additional specifications
- Power reserve
- 60 hours
Learn more about Audemars Piguet
Jules Louis Audemars and Edward Auguste Piguet, both from the Vallée de Joux, formalised their partnership in 1875. The valley was then the centre of complicated movement work, and the pair spent their early decades supplying calibres to other houses — Tiffany among them — rather than selling under their own name.
The firm remains privately held by descendants of the founding families, an unusual survival in an industry consolidated into three or four groups.
Its defining moment came in 1972, in the depths of the quartz crisis, when Audemars Piguet released the Royal Oak: a steel watch priced above gold ones, with an octagonal bezel, exposed screws, and an integrated bracelet, drawn by Gérald Genta reportedly overnight. It was widely mocked at launch. It created the luxury sports watch category and now underpins the entire company.
The Royal Oak Offshore of 1993 pushed the same design larger and louder, and drew similar early scepticism before becoming a pillar in its own right. The Code 11.59 collection, introduced in 2019, was the house's attempt to prove it could sell something else — a mixed reception commercially, though the movements inside are serious.
Underneath the modern noise, the complication pedigree is intact: minute repeaters, perpetual calendars, and some of the thinnest tourbillon movements built anywhere.
- 1875
- Jules Louis Audemars and Edward Auguste Piguet begin working together.
- 1881
- The firm is registered as Audemars Piguet & Cie.
- 1972
- The Royal Oak launches, inventing the luxury steel sports watch.
- 1993
- The Royal Oak Offshore extends the line.
- 2019
- Code 11.59 debuts as a new collection.
Also in 4 collections
This watch appears in Stainless Steel Watches (2,616), Automatic Watches (1,362), Pre-Owned, Ex-Display & Vintage Watches (235) and Grey Dial Watches (197).
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 37mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- Sits in the lower half of Audemars Piguet's range as we list it
Worth knowing
- 50m suits rain and handwashing, not swimming
Compare alternatives
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| Specification | 15550ST.OO.1356ST.07 | O13150392002002 | 85250/000P |
|---|---|---|---|
| Price | £35,550 | £33,000 | £30,995 |
| Case size | 37mm | 39mm | 40mm |
| Water resistance | 50m | 50m | 30m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Leather strap |
| Power reserve | 60 hours | 55 hours | 43 hours |
| This watch |
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|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Showering yes, swimming no. 50m covers splashes and brief immersion, but a swimming stroke generates well above the pressure that figure describes.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How long does it run for when it's not worn?
About 60 hours fully wound — enough to survive a night off the wrist, but not a full weekend.
Is it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
Cheapest place to buy
Mappin & Webb at £35,550, pre-owned. No UK retailer we track lists this reference new.
Is this available new?
Not from the UK retailers we track. This reference is listed as pre-owned only, at £35,550 from Mappin & Webb. A pre-owned watch has been worn, and is normally sold under the retailer’s own warranty rather than the manufacturer’s.
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