A fake Audemars Piguet Royal Oak 15311 fails at least one of five checks: case thickness and bezel geometry, the raised tapisserie dial grid, the date window font and alignment, bracelet taper and edge beveling, and the movement finishing visible through the sapphire caseback. Genuine 39 mm Royal Oak selfwinding references in this family measure roughly 9.4 mm thick and use the calibre 3120 with a solid gold oscillating weight and a 60-hour power reserve. Replicas rarely match every one of those details at once.
Does the reference number 15311 match a real Audemars Piguet?
Audemars Piguet documents its Royal Oak selfwinding line under references such as 15300 and 15400, not 15311. A listing that uses a number with no matching factory record is a first red flag, because counterfeit sellers often transpose or invent digits to avoid search filters and takedown tools.
Look the number up in the brand's official catalog before anything else. If the reference, dial color, case size, and bracelet type do not line up in one listing, treat the watch as unverified.
What are the fastest visual tells on a fake Royal Oak 15311?
- Case thickness: genuine 39 mm Royal Oak cases sit near 9.4 mm. Replicas usually run 1 to 2 mm thicker because the copied movement does not fit the real case profile.
- Bezel screws: the eight hexagonal screws should be flush, evenly spaced, and aligned to the same radial angle. Fakes show raised heads, uneven gaps, or slotted screws.
- Tapisserie dial: the genuine Grande Tapisserie grid is raised, sharply cut, and uniformly reflective. Copy dials look flat, blurry, or over-stamped.
- Date window: the aperture should be crisp, properly chamfered, and positioned with even margins around the numerals.
- Bracelet: the integrated bracelet tapers steadily toward the clasp with polished chamfers running down each link edge. Fakes taper unevenly or lose the chamfer entirely.
How do you inspect the case and crown?
Run a finger along the bezel edge and the case flanks. Genuine Royal Oak finishing alternates brushed flats with mirror-polished bevels, and the transition lines stay razor sharp under magnification.
Check the crown for the applied AP logo and the correct number of gasket steps. Counterfeit crowns are often slightly oversized, softly engraved, or seated unevenly against the case.
What should the movement look like through the caseback?
The calibre 3120 shows Geneva stripes, circular graining, beveled bridges, blued screws, and a skeletonized gold rotor engraved with the brand name and the AP family crest. Fakes typically show stamped decoration, a plated brass rotor, and inconsistent engraving depth.
Wind the watch and watch the seconds hand. A genuine example sweeps cleanly at 21,600 vibrations per hour with no stutter, and the rotor spins with a faint, solid whir rather than a rattle.
Can a super clone or first copy pass as genuine?
High-end replicas can fool a casual glance, but they still fail a loupe inspection at the dial print, the caseback engraving, and the movement. Serial and caseback numbers on counterfeits are often reused across batches, so two watches from different sellers can carry identical stamps.
The only reliable test is a hands-on check by an authorized dealer or a watchmaker who services Audemars Piguet. Ask for the movement to be opened, not just photographed.
How do you verify a Royal Oak before you buy?
- Confirm the reference against the official catalog and match every specification.
- Request macro photos of the dial, caseback, clasp, and movement, plus a video of the running seconds.
- Ask for service records or an extract from the archives that ties the serial to the reference.
- Pay only after an independent watchmaker confirms the movement and case numbers match.
A price far below market for a steel Royal Oak is the strongest signal of all. Authentic examples hold value, so deep discounts almost always point to a counterfeit.