A fake Audemars Piguet Royal Oak Offshore 25940 reveals itself in three places: the bezel screws, the tapisserie dial texture, and the caseback engraving. On genuine examples the screws sit flush and align with the case edges, the dial grid is molded with sharp raised ridges, and the back engraving is deep and even. Most replicas fail at least one of those checks within a few seconds of handling.
What Reference 25940 Is
The 25940 belongs to the 42 mm Royal Oak Offshore chronograph family that Audemars Piguet built after the original 1993 Offshore. The reference covers a group of dial themes and metal combinations rather than one single watch, so the first step in any authenticity check is confirming which exact variant you are looking at and what it should have come with.
Case, Bezel, and Screw Details
- Eight hexagonal bezel screws. On genuine pieces the slots are cut so they align with the octagon. Fakes often show random angles, shallow slots, or screws that sit in the bezel as decoration rather than threading into the case.
- Bevels and brushing. The transition between brushed and polished surfaces should be a crisp line. Replicas round these off or polish areas that should stay matte.
- Case profile. Offshore cases are thick with pronounced shoulders. A case that looks thin from the side or has soft lug curves is a warning sign.
- Crown and pushers. The rubber-coated crown and pushers should feel solid, seat cleanly, and line up with the case band.
Dial, Hands, and Subdials
The tapisserie pattern is the hardest detail to copy. Genuine dials have a three-dimensional grid with sharp ridges and even spacing across the full surface. Fakes tend to show a flatter grid, uneven spacing near the date window, or a texture that looks printed instead of molded.
Check the printing under magnification. The brand name, the chronograph text, and the minute track should be crisp with no bleeding. Hands should be finished on all sides, with even lume fill and matching length on the subdial hands. Subdial hands that do not return to zero after a chronograph reset point to a low-grade movement.
Movement and Caseback
Where a 25940 has a display back, the movement finish settles the question. Genuine chronograph calibers show Geneva stripes, circular graining, polished screw heads, and correctly engraved rotor text. Replicas often use a generic chronograph with a decorated rotor plate that looks stamped.
Solid casebacks still give information. The engraving should be deep, evenly spaced, and free of double-struck letters. Reference and serial numbers sit between the lugs and should be verifiable against brand records.
Strap, Buckle, and Weight
Rubber straps on genuine Offshores have a specific flex, a clean cut edge, and hardware stamped with even lettering. Fakes often use softer rubber, a poorly shaped buckle, and a clasp that feels light for the size of the watch.
Paperwork and Provenance
An Extract from the Archives issued by Audemars Piguet confirms the original configuration of a specific serial number. Service records, original boxes, and matching documentation add confidence. A seller who will not share a serial number for verification is the biggest red flag of all.
Legal Reality
In the United States, selling counterfeit watches is trademark infringement, and U.S. Customs and Border Protection can seize shipments of counterfeit goods. The Federal Trade Commission also warns buyers that knockoffs carry no warranty and no recourse. That matters when a bargain on a Royal Oak Offshore turns out to be impossible to resell or insure.