Short answer
A fake Reine de Naples tourbillon is a replica of Breguet's oval ladies' watch, and the tourbillon is the part most of them get wrong. Cheap versions put a spinning disc behind an opening in the dial and call it a tourbillon. Working tourbillons do exist in replica form, since Sea-Gull and Hangzhou both build real ones, but a watch that uses one starts around several hundred dollars. If the listing is under roughly two hundred dollars, you are buying decoration.
What the original is
Breguet's Reine de Naples goes back to an 1810 order from Caroline Murat, Napoleon's sister and the Queen of Naples. The shape is the whole point: an elongated oval case, about 36.5mm by 28.5mm, with the dial set slightly off center and the crown down at 4 o'clock. The caseband carries fine fluting, the dials are usually mother of pearl, and the hands are Breguet hands with the hollow eccentric tip. Tourbillon references sit in the five and six figure range at retail, so nobody buys a real one by accident.
Real tourbillon or fake cage
A tourbillon puts the balance and escapement inside a cage that rotates, one turn per minute in most designs. That rotation is what you check before anything else.
- Watch the cage for a full minute. It should make one clean revolution. A disc that wobbles, jumps or spins fast is a fake.
- Look inside the cage. A real one shows an escape wheel and pallet fork doing the ticking.
- Check the seconds. On many real tourbillons the small seconds hand rides on the cage, so the two move together.
- Ask for the movement by name. A seller who cannot say what is inside does not know what is inside.
- Mind the price floor. A bare Chinese tourbillon movement costs a few hundred dollars on its own, before the case, dial and strap.
Case and dial details I look at
- Fluting on the caseband. On the real watch the flutes are cut deep and even. On replicas they are often shallow or rubbed out near the lugs.
- Oval proportions. A squat or too narrow oval reads wrong from across a table.
- Hands. Breguet hands have a hollow circle near the tip. Stamped copies lose that shape and look flat.
- Mother of pearl. Good MOP has depth and shifts color as you turn your wrist. Printed or foil dials do not.
- Signature. Check letter spacing on the dial and the caseback engraving. This is where most fakes show their hand.
- Crown at 4 o'clock. It should sit flush against the case, not float or catch on fabric.
- Strap and clasp. Thin alligator print and loose deployment clasps are the fastest way to spot a cheap build.
What it costs
Three rough tiers exist. Under two hundred dollars gets you a quartz or basic automatic with a decorative cage and plated steel. From about three hundred to seven hundred gets a real Chinese tourbillon in a decent steel case with a sapphire crystal. Above that you are paying for better finishing, a closer dial and a nicer strap, but the movement is usually the same family. None of these are gold, whatever the caseback stamps say.
Honest caveats
A Chinese tourbillon is delicate. Servicing one is hard because many local shops will not touch it, and parts come from the same supply chain you bought from. Water resistance on these watches is close to zero, so keep them away from sinks and pools. Plating wears through at the crown and lugs within a couple of years of daily wear. And there is the legal side: these watches infringe a live trademark, and customs can seize a shipment at import. Buy with that in mind, not as a surprise later.