The replica royal oak offshore 26170ST predates the 26400 generation and represents an earlier chapter in the Offshore chronograph story. At 44mm in steel with a black dial and brown leather strap, the 26170 uses the same Cal. 3126/3840 that would carry forward into the next generation but with the case design language of its era — slightly softer transitions between crown guards and case flanks, and a different pusher profile. It is the Offshore chronograph that collectors seek for its vintage proportions.
The Pre-26400 Generation
The 26170 sits in the Offshore chronograph lineage between the original 25721 and the 26400 that most people recognize today. The case dimensions are identical at 44mm, and the Cal. 3126/3840 is the same movement. What differs is the case execution — the 26170 era featured crown guards with slightly more rounded transitions, a bezel that sits marginally higher above the case middle, and pusher shapes that would be refined in the subsequent generation.
On leather rather than rubber, the 26170ST reads differently from the modern Offshore. The brown alligator strap warms up the steel case and shifts the watch from pure sport into a territory that overlaps with dressy chronographs. It is a combination AP does not offer in the current catalog, which gives the 26170 a character that newer references cannot replicate.
Vintage Offshore Appeal
The other 26170ST configuration in the collection shares this platform with different details. Both use the same case and movement, and both carry the design language that pre-dates the current Offshore look. For collectors tracking the evolution of the Offshore chronograph, the 26170 represents the bridge between the original concept and the refined 26400/26401 generation.
This replica royal oak offshore 26170ST with its black dial on leather offers something the current lineup does not: the Offshore chronograph as a leather-strap watch with vintage-generation proportions. The 50-hour power reserve from Cal. 3126/3840 keeps it practical for rotation wear. Explore the full Offshore range or check warranty coverage for details on this reference.
| Reference | 26170ST.OO.D101CR.01 |
| Case | 44mm · Stainless steel |
| Bezel | Octagonal · 8 hexagonal screws |
| Dial | Black · Mega Tapisserie |
| Crystal | Sapphire · AR coating |
| Caliber | 3126/3840 · Column-wheel chronograph · 50h reserve |
| Strap | Brown alligator · hand-stitched |
| Buckle | Stainless steel · AP folding clasp |
| Water | 100m / 10 ATM |
| Functions | Hours, minutes, small seconds, date, chronograph |
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