Quick answer
A fake Cartier Tank Must in pink almost always fails on four points: case dimensions, dial lacquer depth, caseback engraving, and movement type. The Tank Must runs on quartz, so an automatic movement under a display back is a clear sign of a counterfeit. Measure the case, compare the reference number against Cartier's own catalog entry, and read the caseback text with a loupe before you hand over money.
Pink dials and pink straps appear in the Tank Must line in limited runs, so the first question is whether the reference number the seller quotes exists in Cartier's catalog at all. Many counterfeits are built on a reference that was never produced.
What you need
- A jeweler's loupe at 10x magnification
- Digital calipers
- A kitchen scale accurate to 1 gram
- The seller's reference number and photos
- Cartier's published specifications for that reference
How to check a suspect Tank Must
- Ask the seller for the full reference number and confirm it appears in Cartier's catalog with a pink dial or strap option.
- Measure the case length, width and thickness with calipers and compare each figure against Cartier's published dimensions for that size.
- Study the dial lacquer under the loupe and look for a flat, plastic appearance instead of a deep, even gloss.
- Read the printed dial text and confirm the lettering is crisp, evenly spaced and correctly spelled.
- Inspect the crown and its blue cabochon, checking that the stone sits flush and that the crown ridges are uniform.
- Turn the watch over and read the caseback engravings for depth, sharpness and correct reference and serial formatting.
- Confirm the movement type, since the Tank Must is quartz and a visible automatic rotor indicates a fake.
- Weigh the watch and compare it against the weight you would expect from a steel case of that size.
- Examine the strap and buckle, checking stitching density, leather grain and the finish of the folding clasp.
- Contact Cartier customer service with the serial number and ask them to confirm the reference it belongs to.
Red flags that repeat
- Serial numbers that return a different model or a different metal when checked.
- Casebacks with shallow laser etching rather than cut engraving.
- Dial text with thin or merged letters.
- A crown that wobbles or a cabochon that is glued proud of the surface.
- A seller who will not provide clear macro photos of the caseback and crown.
- Paperwork printed on stock card with generic fonts.
If you already bought one
Stop wearing it and keep every message, photo and payment record. Counterfeit watches are illegal to sell in the United States, and a seller who passed off a fake as genuine has committed fraud. Report the sale to the platform where it happened, to your payment provider, and to the U.S. Customs and Border Protection tip line if the watch was imported. A jeweler or watchmaker who handles Cartier can confirm the movement and case in minutes.
Before you buy
Buy only from an authorized Cartier retailer or a seller who will meet at a watchmaker for inspection. A price far below the market for a steel Tank Must is the oldest signal there is. Counterfeiters copy photos well and metal poorly.