Quick answer
A fake Audemars Piguet tourbillon is a replica Royal Oak, usually the openworked 41mm or 42mm style, built around a Chinese-made movement. Prices sit somewhere between $150 and $900. That range covers two very different products: watches with a real rotating tourbillon cage, and watches with a cut-out that only looks like one. Neither is a genuine AP. The real Royal Oak Tourbillon uses an in-house calibre and trades well north of six figures.
What is inside these watches
Almost every replica tourbillon on the market runs a Seagull, Hangzhou, or Dandong movement. These are honest mechanical tourbillons, hand-wound or automatic, beating at 21,600 vph with 40 to 60 hours of reserve. The cage makes one full rotation per minute. They can run well for years if you treat them gently, and they can also arrive running badly and stay that way.
The case, bracelet, dial, and hands are made separately, which is where the visual differences show up. A $250 build and an $800 build can share the same movement and still look like two different watches on the wrist.
The three tiers you will see
Tier one: the decorative open-heart
Roughly $60 to $150. There is no tourbillon. What you see through the dial opening is a balance wheel oscillating back and forth, or a printed cage graphic. Sellers label it tourbillon anyway. A quick test: watch the opening for a full minute. If nothing rotates a full turn, it is not a tourbillon.
Tier two: a working tourbillon
Roughly $250 to $600. The cage spins, the escapement is real, and the watch keeps time within maybe 10 to 20 seconds a day out of the box. Case finishing is decent from arm's length and soft up close. Dial printing, screw heads, and bracelet edges are the usual weak points.
Tier three: the high-end builds
Roughly $600 to $1,000 and up. Custom bridges, better brushing and polishing, engraved casebacks, sometimes a genuine sapphire crystal with proper anti-reflective coating. These get close in photographs. In hand, the weight, the bracelet flex, and the hand-finishing on the bridges still give it away to anyone who has handled the real watch.
Details that expose a replica AP
- The tapisserie pattern. Genuine Royal Oak dials are stamped with a sharp, uniform grid. Replicas look soft or slightly uneven under a loupe.
- Date font and window. The aperture is often too large, and the numerals are a hair too thin or too bold.
- Caseback engraving. Serial fonts vary from watch to watch on replicas. Genuine pieces are consistent.
- Weight. A steel Royal Oak Tourbillon feels denser than most replicas because the case and bracelet are machined to tighter tolerances.
- Movement finishing. Look at the bridges through the back. Real haute horlogerie has beveled edges and polished screw heads. Replicas have machined flats and painted screws.
What you give up
No service network. No parts. Water resistance is a marketing claim, not a tested rating, so swimming is a bad idea. Resale value is effectively zero, and a watchmaker may refuse to open the case for liability reasons.
Legal and shipping reality
Counterfeit watches infringe a registered trademark. In the United States, Customs and Border Protection can seize and destroy shipments, and repeat importers face civil penalties. Domestic shipping is lower risk than international, but no seller can promise it. If a package is stopped, the money is usually gone.