Watch reference library
Audemars Piguet Royal Oak Offshore Chronograph 26470ST
Produced 2014 to 2021 (approximate). Discontinued.
The Audemars Piguet Royal Oak Offshore Chronograph 26470ST is a 42mm stainless steel watch with the calibre 3126/3840, water resistant to 100 meters, made 2014 to 2021.
Specifications
- Case size
- 42mm
- Case material
- Stainless steel
- Bezel
- Octagonal stainless steel bezel secured by eight hexagonal screws
- Dial
- Mega Tapisserie pattern, offered across a range of colors including black, blue, and brown, with a date window and three chronograph counters
- Movement
- Calibre 3126/3840, automatic
- Power reserve
- 50 hours
- Water resistance
- 100 meters
- Crystal
- Sapphire, scratch resistant
- Bracelet
- Stainless steel bracelet, with rubber and leather strap options also offered on certain dial variants
The story
The 26470ST is a generation of the Royal Oak Offshore Chronograph in the model's long-running 42mm steel format, presented in 2014 as a substantial revamp of the case architecture that had carried the Offshore chronograph since the 2000s. It kept the collection's signature oversized octagonal bezel and Mega Tapisserie dial while updating the lug shape, crown guard, and pusher detailing, giving the watch a more refined profile than the earlier Offshore generations without abandoning the model's bulk and presence. Mechanically, the reference used the Calibre 3126/3840, an automatic chronograph movement combining AP's in-house 3120 base caliber with a modular chronograph mechanism, delivering roughly 50 hours of power reserve. This movement had already been used across earlier 42mm Offshore chronograph references, so the 26470ST's main contribution to the line was case and dial refinement rather than a mechanical leap. The Royal Oak Offshore itself traces back to the 1993 reference 25721ST, which took Gerald Genta's original 1972 Royal Oak design and scaled it up dramatically for a market that wanted larger, sportier watches. The 26470ST represents a mature, later stage of that lineage, produced for roughly seven years before Audemars Piguet moved the Offshore chronograph line to the 26420 generation, a case update built around the newer, fully integrated Calibre 4401 flyback chronograph movement.
What to check before you buy
Because the 26470ST covers many dial and strap combinations produced over several years, confirm the exact commercial reference (the suffix after 26470ST, such as .OO.A027CA.01) matches the dial color, strap material, and box and papers being offered, since AP catalogued numerous variants under this base number. Buyers should also check that the reference has not been confused with the visually similar but mechanically different 26170ST generation that preceded it, or with the later 43mm 26420 generation that replaced it. As with any automatic chronograph of this vintage, ask when the movement was last serviced. AP recommends service roughly every few years for pieces in regular use, and a chronograph movement with a modular construction like the 3126/3840 can be more involved and costly to service than a simpler three-hand caliber. A full set with original box, warranty card, and any spare links adds resale confidence.
Buying or selling a 26470ST?
Selling one? Text photos to (605) 521-2821 for an offer within hours, or ask for one below. Moda pays by wire or Zelle within 24 hours of receiving the watch, on its own insured label. Rather sell it yourself? Post it in the Moda watch groups and run the listing through the Post Checker first. Buying one from someone you don't know? Moda's middleman service inspects the watch at Moda HQ and the buyer pays the seller only after approving the condition report. When it ships, it goes fully insured through ShipIFS, the shipping vendor Moda uses for its own watches.
A Serial Check tells you whether this 26470ST has been reported stolen and whether its dial and bracelet are the factory originals.
Moda Watch Club is the Moda group for luxury watches, and Moda Watch Club: 10K & Under covers watches below that line. Both are free to join with a join code.
Common questions
Is the 26470ST still in production?
No. Audemars Piguet discontinued this generation of the 42mm steel Offshore Chronograph, moving the line to the newer 26420 generation with the in-house Calibre 4401. All 26470ST examples now come from secondary market inventory.
What movement does the 26470ST use?
It uses the Calibre 3126/3840, an automatic movement combining AP's 3120 base caliber with a chronograph module, offering around 50 hours of power reserve.
How is the 26470ST different from the 26170ST?
The 26470ST, introduced in 2014, revised the case proportions, lugs, and crown guard of the 42mm Offshore Chronograph compared with the earlier 26170ST generation, while both used closely related chronograph movements.
What water resistance does the 26470ST have?
It is rated to 100 meters, in line with other steel Royal Oak Offshore chronographs of this generation.
Does the 26470ST come on a bracelet or a strap?
Both. Most steel bracelet versions exist, and AP also issued dial variants of this reference on rubber and leather straps, so the strap or bracelet fitted should be checked against the full commercial reference number.