AP Royal Oak Offshore 26237ST.OO.1000ST.01 Guide (2026)

The Audemars Piguet Royal Oak Offshore reference 26237ST.OO.1000ST.01 is a 42 mm automatic chronograph in stainless steel, with a blue Méga Tapisserie dial and the octagonal bezel and integrated bracelet that have defined the Offshore line since 1993. This guide covers the specifications, how the 42 mm case compares with AP's larger Offshore chronographs and the smaller Royal Oak Chronograph, how it wears, price context in 2026 and what to check before buying. Bizak & Co. sources the 26237ST.OO.1000ST.01 to order; the Royal Oak Offshore collection lists the configurations we can seek.

Last reviewed on September 28, 2026 by Filip Biczak. Prices are dated observations, not quotes.

Audemars Piguet Royal Oak Offshore 26237ST.OO.1000ST.01 specifications

Case, dial and collection details checked against Audemars Piguet's published watch collection pages and the brand's service information for maintenance intervals. Confirm the exact calibre reference and power reserve for this specific piece on the papers; a family write-up is not a substitute for the watch in hand.

What is the Royal Oak Offshore, and how does 26237ST.OO.1000ST.01 fit in?

Audemars Piguet launched the Royal Oak Offshore in 1993, designed by Emmanuel Gueit as a bolder, larger-cased extension of Gerald Genta's 1972 Royal Oak. Nicknamed "the Beast" in its early years for a case size that was unusually large at the time, the Offshore kept the octagonal bezel, exposed screws and integrated bracelet of the original Royal Oak while scaling the proportions up and adding chronograph function to most references. The line has since become AP's principal sports-chronograph platform, sold alongside the smaller, dressier Royal Oak Chronograph.

Reference 26237ST.OO.1000ST.01 sits at 42 mm, smaller than the Offshore's traditional 44 mm chronograph cases, which puts it closer in hand to the Royal Oak Chronograph while keeping the heavier Offshore case architecture and Méga Tapisserie dial finish. The blue dial and steel case are a common, widely worn configuration within the current Offshore catalogue rather than a limited or unusual variant.

42 mm, 44 mm or the Royal Oak Chronograph: which case size?

Audemars Piguet sells Offshore chronographs in more than one case size, and the Royal Oak Chronograph is a separate, thinner line at a comparable diameter. The table below compares this page's reference against a closely related configuration in Bizak's sourcing catalogue and two other AP chronographs for scale.

Treat the P1 suffix as a configuration marker, not a generational change; the two references share the case size and dial colour, and the price gap reflects specific finish or set differences that should be confirmed on the invoice rather than assumed from the reference alone. The 44 mm Offshore is a visibly larger, heavier watch and prices well above the 42 mm case in Bizak's current catalogue; the Royal Oak Chronograph trades the Offshore's exposed-screw bezel and heft for a slimmer profile and reads dressier on the wrist.

How does the 26237ST.OO.1000ST.01 wear on the wrist?

At 42 mm the Offshore reads as a genuine sports watch rather than a dress piece, with the octagonal bezel and exposed screws giving it more visual weight than the diameter alone suggests. The integrated steel bracelet keeps the case-to-wrist transition seamless and distributes the watch's mass evenly, which matters on a chronograph case this substantial. The Méga Tapisserie dial pattern catches light differently to the smaller Tapisserie finish on the standard Royal Oak, giving the dial a more textured, less uniform look up close.

Compared with the 44 mm Offshore chronographs, the 42 mm case sits noticeably closer to the wrist and works under a cuff more easily, while still being larger and heavier than the 41 mm Royal Oak Chronograph. Buyers moving from a Datejust-sized watch should expect a real step up in both diameter and case thickness; trying the reference on before buying is the only reliable way to judge fit.

Who is the Royal Oak Offshore 26237ST.OO.1000ST.01 for?

This reference suits a buyer who wants a recognisable, bold sports chronograph with genuine wrist presence and does not mind a case that reads large under a shirt cuff. The blue dial and steel case combination is a mainstream, easy-to-source configuration within the Offshore range rather than a rare or discontinued dial, which matters for anyone weighing long-term serviceability and resale liquidity. It is not the right choice for a buyer who wants a slim dress chronograph or the smallest AP case available; the Royal Oak Chronograph or a Code 11.59 chronograph generally serve that brief better.

Price and availability in 2026

Bizak & Co. sources watches to order; this catalogue entry is not confirmation that a specific example is on hand for immediate delivery. On 28 September 2026 our sourced catalogue listed this pre-owned, full-set 26237ST.OO.1000ST.01 at US$27,899, against a compare-at figure of US$29,999 the same day. The closely related 26237ST.OO.1000ST.01P1 listed at US$34,409, the 44 mm Offshore 26400SO.OO.A057CA.01 at US$74,399, and the Royal Oak Chronograph 26331ST at US$51,500, all subject to change and condition. We do not publish authorized-dealer allocation data or invented "market median" figures for the Offshore line; treat every figure above as a dated, sourced-to-order observation, not a live quote.

Is the 26237ST.OO.1000ST.01 a good buy?

Buy this reference for the specific combination of a 42 mm Offshore case, blue Méga Tapisserie dial and full set documentation, not as a speculative flip. Steel Offshore chronographs move through the secondary market on demand for the specific dial and case-size combination; a full-set example with matching papers holds more interest at resale than a watch-only piece. If wrist presence at the largest available Offshore size matters more to you than a 42 mm case, compare the 44 mm reference above before committing.

Buying a pre-owned Royal Oak Offshore: what to check

• Bracelet and clasp condition. Inspect every link for stretch, scratches and play in the folding clasp. Integrated bracelets on steel Offshore pieces take daily wear hard; ask for close photographs of the underside of each link.
• Dial integrity. Look at the blue Méga Tapisserie dial under different light sources for fading, moisture marks or damage near the subdials. The dial pattern is the most expensive part of the watch to address if it is compromised.
• Authenticity and papers. Cross-check the reference number and serial on the caseback against the warranty papers. A genuine AP full set should match at every point; a reference that does not match its papers is a warning sign, not a bargain.
• Service record. Ask when the movement was last serviced and request any service receipts in writing. A selfwinding chronograph needs periodic service to keep timing and chronograph function accurate.
• Bezel screws and gaskets. Confirm the eight bezel screws are present, undamaged and original; replaced screws or a re-gasketed case can point to prior repair work that should be disclosed.

Our authentication process describes what we inspect before dispatch.

Quick answers

How much is the Audemars Piguet Royal Oak Offshore 26237ST.OO.1000ST.01?

Bizak's sourced catalogue listed this pre-owned, full-set example at US$27,899 on 28 September 2026, sourced to order and subject to change and condition.

What is the case size of the 26237ST.OO.1000ST.01?

42 mm stainless steel, smaller than AP's 44 mm Offshore chronographs and slightly larger than the 41 mm Royal Oak Chronograph.

Does this example include box and papers?

Yes, it is offered as a full set. Confirm the reference and serial match the papers before purchase.

How does the 42 mm Offshore compare with the 44 mm version?

The 44 mm Offshore is a visibly larger, heavier watch and priced well above the 42 mm case in Bizak's current catalogue; the 42 mm size sits closer to the wrist and under a cuff more easily.

Is the Royal Oak Offshore part of AP's chronometer-certified production?

Audemars Piguet's current chronograph movements are tested to the brand's own internal standards; independent certification bodies such as the Contrôle Officiel Suisse des Chronomètres certify movements across the wider Swiss industry, and any specific certification claim for this piece should be confirmed on the papers.

Request a 26237ST.OO.1000ST.01 sourcing quote

Tell us your preferred condition, whether box and papers are required, plus your budget and timing, through our sourcing enquiry form. We confirm the specific watch, photographs, papers and final price before you commit. Catalogue entry: 26237ST.OO.1000ST.01 product page; browse the Royal Oak Offshore collection, the chronographs collection, or sell or trade your chronograph.

Related reading: Royal Oak authentication and collecting guide · Audemars Piguet price guide · Watch nicknames explained · Pre-owned watches.