A fake Cartier Tank Must yellow is almost always a quartz copy built on a plated brass or steel case, not the solid 18K gold Cartier uses. The fastest tells are weight, a missing Swiss gold hallmark, a flat glass cabochon, and shallow laser-engraved text on the caseback. A genuine Tank Must carries a Cartier-signed movement, crisply cut markings, and reference and serial numbers that match each other.
What does yellow mean on a Tank Must listing?
The word covers three different things, and counterfeit sellers lean on that ambiguity. It can mean a solid 18K yellow gold case, a gold-plated finish over steel, or a yellow-toned dial. Get the seller to state which one applies in writing before you pay.
Solid 18K yellow gold
Gold cases carry the 750 stamp and the Swiss St. Bernard head hallmark, struck deep and clean. Solid gold also has a density you can feel, roughly twice that of a steel case of the same size.
Gold plating and yellow dials
Plated copies wear through at the lugs and caseback edges within months. Yellow dials are often repainted, which shows as uneven text weight under a loupe.
Which details give a fake Tank Must away?
- Weight. An 18K gold Tank Must feels substantial for its size. A plated copy feels hollow and light.
- Hallmarks. Look for the 750 stamp and the St. Bernard head inside the caseback. Copies skip them or stamp them faintly.
- Cabochon. Genuine crowns are set with a domed synthetic blue spinel. Fakes use glass or resin that looks cloudy and sits too high.
- Caseback engraving. Real text is cut with sharp, uniform edges. Replicas show soft, frosted laser marking.
- Dial printing. The Cartier signature uses a consistent Roman-style face, and many Tanks hide the word CARTIER inside the VII numeral. Cartier has left the secret signature off some recent references, so confirm against the exact model first.
- Movement. Genuine Tank Must watches run a Cartier quartz caliber or a mechanical movement. Copies use unbranded generic quartz with no markings.
- Strap and buckle. Signed hardware with even stitching. Replica buckles are stamped thin and often carry the wrong logo size.
Are fake Cartier Tank Must watches illegal in the United States?
Yes. Trafficking in counterfeit goods is a federal crime under 18 U.S.C. Section 2320, and U.S. Customs and Border Protection can seize counterfeit watches at the border. Selling a replica as genuine also exposes the seller to civil liability under the Lanham Act.
Why do so-called 1:1 super clones still fail inspection?
The costly parts of a watch are the parts that photograph badly. Solid gold, finished movements, and deep engraving tooling all carry real cost, so replica makers cut them. A copy that matched those details would cost close to the genuine piece.
What should you do before buying a used Tank Must?
- Ask for the reference and serial number, then compare them with Cartier's published specifications.
- Request close-up photos of the caseback, crown, dial, and buckle from the seller.
- Have a Cartier boutique or a qualified watchmaker open the case and confirm the movement.
- Pay with a method that allows a dispute if the watch fails authentication.