Audemars Piguet
Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01
The Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph (reference 26540ST.OO.A038CA.01) is a 44 mm stainless steel watch with a green dial. It runs on the automatic caliber 2897 and is water resistant to 100 m. It was introduced in 2017.
Specifications
Case
- Reference
- 26540ST.OO.A038CA.01
- Collection
- Royal Oak Offshore
- Case size
- 44 mm
- Thickness
- 14.45 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 100 m
- Bracelet / strap
- Green rubber strap
Dial and bezel
- Dial
- Green
Movement
- Movement
- Automatic
- Caliber
- 2897
- Functions
- Chronograph, Tourbillon
Production
- Production
- 2017 – today (limited)
Dial versions
This reference was made with these dials and finishes.
26540ST.OO.A038CA.01 Green
Green
How it compares within the Royal Oak Offshore family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 26540ST.OO.A038CA.01 (This watch) | 44 mm | Stainless steel | Green | 2897 | 2017– |
| 15720ST.OO.A403CA.01 | 42 mm | Stainless steel | Abyssal blue | 4308 | 2026– |
| 26238CD.OO.1300CD.01 | 42 mm | Ceramic / titanium | Blue | 4404 | 2025– |
| 26238ST.OO.A001VE.01 | 42 mm | Stainless steel | Silver | 4404 | 2026– |
| 26238ST.OO.A001VE.02 | 42 mm | Stainless steel | Black | 4404 | 2026– |
| 26238TI.OO.A001VE.01 | 42 mm | Titanium | Grey | 4404 | 2026– |
| 26420CD.OO.A029VE.01 | 43 mm | Titanium / blue ceramic | Beige | 4401 | 2026– |
| 26420IO.OO.A402CA.01 | 43 mm | Titanium / black ceramic | Green | 4401 | 2026– |
| 26622FO.OO.D700VE.01 | 43 mm | Titanium / ceramic / forged carbon | Red | 2967 | 2026– |
About the Royal Oak Offshore family
The Royal Oak Offshore was introduced in 1993, designed by Emmanuel Gueit as a larger, more robust version of the Royal Oak. The first chronograph, ref. 25721, had a 42 mm case and rubber-clad pushers and crown, and its size was unusual for the time.
The line went on to include the 42 mm and 44 mm chronographs, divers with an internal rotating bezel, such as ref. 15720, and many models in ceramic, titanium, forged carbon and gold. Recent chronographs use in-house calibers such as the 4401 flyback in the 43 mm ref. 26420. Dealers note case size, material and strap, and the condition of rubber parts, which often need replacing at service.
Quick answers
- What size is the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01?
- The Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01 has a 44 mm case, 14.45 mm thick.
- What movement does the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01 use?
- It uses the automatic caliber 2897.
- How water resistant is the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01?
- It is water resistant to 100 metres.
- Is the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01 still in production?
- Limited.
- When did the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01 come out?
- It was introduced in 2017.
- What is the Audemars Piguet Royal Oak Offshore Selfwinding Tourbillon Chronograph 26540ST.OO.A038CA.01 made of?
- The case is stainless steel. Bracelet or strap: Green rubber strap.
Catalog facts checked October 2026.