A replica Audemars Piguet Royal Oak 15311 is, in most listings, a 39mm Royal Oak selfwinding copy with a decorated Asian automatic inside. The number itself is where the confusion starts. Sellers shuffle reference numbers around, and much of what gets sold as a 15311 is chasing the 39mm Royal Oak selfwinding family that collectors know from the 15300 lineage. So ignore the label on the listing and judge the watch. Case shape, the eight bezel screws, bracelet taper, and dial texture decide whether it looks right on a wrist. Price tells you almost nothing.
What the 15311 Label Usually Points To
The genuine Royal Oak that these replicas imitate is a steel sports watch with an octagonal bezel, eight visible hexagonal screws, and an integrated bracelet that flows straight out of the case. That design has been in production since 1972 and has barely changed in spirit. A 39mm version sits between the thin Jumbo and the bigger 41mm models, which is why it wears so well on average wrists. When you see "15311" in a listing, expect a 39mm case, a tapisserie dial, and a date window at three. If the photos show something else, the seller is guessing.
The Case and Bezel Are Where Copies Slip
Case geometry is the first thing I look at, because it is the hardest part to fake well. On a good copy the bezel sits slightly proud of the case band, the bevels along the lugs catch light in one clean line, and the screws line up in the same orientation around the octagon. On a cheap one the bezel looks flat, the screws sit at random angles, and the lugs feel slab-sided. Check the gap between bezel and case. A wide, uneven gap shows up in every photo.
Dial Texture and Printing
The tapisserie pattern should look like small raised squares in a grid, sharp at the edges, not blobby. Cheap dials read like a printed photo of a pattern. Indexes should sit flat and align with the minute track. The date window should be crisp, with a font that does not look stretched. Under strong light, look for dust or fibers sealed under the crystal, which is a common giveaway on budget builds.
Bracelet, End Links, and Taper
The bracelet is where a replica either feels like a real watch or like a toy. End links should fit the case with no visible slop. Links should taper down toward the clasp, and the edges should be softened, not knife-sharp. Flex the bracelet in your hand. Rattle and side-to-side play mean cheap pins. A single solid feel with smooth articulation is what you want.
What Is Actually Inside
Most of these run a 28,800 bph Asian automatic with a rotor and bridges decorated to resemble a high-end caliber. That is fine for daily wear, but ask which movement is in the watch, ask for a photo of the caseback and the movement, and expect a power reserve around 38 to 45 hours. A smooth sweep of the seconds hand at 8 beats per second is a decent quick check that you are not looking at a 21,600 bph budget unit.
A Short Pre-Purchase Checklist
- Ask for a photo of the watch on a ruler or caliper so you can confirm the case width.
- Request close-ups of all eight bezel screws and check their alignment.
- Ask for a straight-on dial shot in daylight, not a filtered studio render.
- Confirm the bracelet size and whether spare links are included.
- Get the movement name in writing and a photo of the caseback.
- Use a payment method with buyer protection, and read the return policy first.
The Part Nobody Mentions
Counterfeit watches shipped into the United States can be seized by customs, and selling them as genuine is a crime. Buyers treat this as a grey area, but it is worth knowing before you spend. If you want the look without the risk, there are honest homages with similar case shapes and no fake branding on the dial. That route costs less and gives you a real warranty. Either way, the inspection points above still apply.