The short answer

A fake Vacheron Constantin Traditionnelle Tourbillon usually fails in three places: the back of the case, the tourbillon carriage at 6 o'clock, and the paperwork. Copies get the outline right because the outline is easy. The stepped bezel, the fluted caseband, the slim lugs and the round dial with a cage at 6 o'clock all photograph well. What does not photograph well is a movement with a peripheral rotor, a cage cut in the shape of a Maltese cross, and a serial number that matches a certificate. Start at the caseback and work forward. Most fakes end the conversation there.

What the real watch is doing

The Traditionnelle Tourbillon is Vacheron Constantin's classic dress watch with a one-minute tourbillon inside it. The maison has been in Geneva since 1755, which is the reference point for the whole Traditionnelle line. The modern watch runs a self-winding tourbillon caliber (the 2160 family) with a peripheral oscillating weight. That rotor swings around the edge of the movement instead of sitting on top of it, which keeps the watch thin and leaves the bridges on view. The tourbillon cage rotates once a minute and is cut in the shape of the Maltese cross, the house emblem. Many versions carry the Poincon de Geneve, the Geneva Seal, stamped on the movement. Case metal is platinum or 18k pink or white gold, and retail sits deep in six figures.

How to spot a fake

The movement, not the dial

Turn the watch over first. On the real caliber you see bridges in Cotes de Geneve, bevels cut and burnished by hand, circular graining on the wheels and polished screw heads. The rotor arcs around the periphery. Almost every replica in this niche uses one of two shortcuts. The cheap one puts a decorated plate and a fake rotor bridge over a plain movement, so the "tourbillon" at 6 o'clock is an aperture with a spinning weight behind it. The better one fits a genuine but inexpensive Chinese tourbillon, often hand wound, with a central flying cage and simple finishing. It ticks, it rotates, and it will fool a photo. It will not fool a loupe, and it is not the same architecture as the original.

The tourbillon carriage

Look at the shape of the cage. Real Vacheron tourbillon carriages are built on the Maltese cross, with the four arms of the cross forming the bridge above the balance. Fakes use a plain round cage, a three-arm star, or a flat plate. Check the small seconds hand too. On the genuine watch it is mounted on the cage and turns with it, one full turn every minute. On faux tourbillons the hand often runs from a separate pinion while something else spins behind it. Under a loupe you can watch the balance oscillate inside the cage and see whether the cage and the hand stay locked together.

Case, dial and finishing

Platinum is dense and cold in the hand. Gold plating over steel is neither, and it wears at the edges of the lugs and the caseback rim within months. The classic Traditionnelle case has a fluted, coin edge style caseband and a stepped bezel with crisp polished bevels. Replicas soften those steps because the case is cast and finished on a wheel rather than cut from solid stock. On the dial, look at the printed text and the subdial. Genuine printing sits under a loupe as a clean edge with no halo or double line. Applied markers are set with visible, even feet from the back, and their polished bevels catch light the same way at every hour. Replica indices are glued and often sit a touch high or crooked.

Numbers and paperwork

The caseback number, the movement number and the documents should agree. Vacheron engraves deep, with the lettering filled and polished flush. Fakes laser or stamp shallow and you can feel the burr. The Maltese cross on the crown and the engraving on the caseback are places where cheap tooling shows first. Ask for the certificate, the service history and the original invoice. If the seller cannot explain the provenance of a six figure watch in plain language, the price is the least of your problems.

Red flags I check first

• An "open heart" at 6 o'clock that is not a cage with a balance inside it.
• A rotor with a solid engraved plate hiding the movement.
• Case weight that feels light for platinum or white gold.
• Dials photographed only at an angle or in low resolution.
• A price in the low thousands for a watch that should cost six figures.
• No matching certificate, no service records, no answers about the serial.

The replica market for this model

Pricing for fake Vacheron Constantin Traditionnelle Tourbillon watches splits into two groups. The bottom group, a few hundred dollars, buys a case with everything decorative and a quartz or basic automatic movement behind it. The top group, often two thousand to five thousand dollars, buys a working Chinese tourbillon in a steel case with plated gold. That is real money for something that carries no warranty, cannot be serviced by an authorized watchmaker, and will not hold value. For the same budget you can buy a solid Swiss or Japanese dress watch with papers and a service network.

The legal side

Trafficking counterfeit goods is a federal crime in the United States under 18 U.S.C. Section 2320, and U.S. Customs and Border Protection seizes counterfeit shipments at the border. Wearing a fake is not the risk. Buying, importing and reselling one is, and so is passing it off in a private sale, which is fraud. If you already own a watch you suspect is fake, an authorized service center or a watchmaker with Vacheron training can confirm it, and that costs far less than the lawsuit.