A replica Cartier Tank Must two tone is a counterfeit copy of a watch Cartier makes. The genuine two tone Tank Must pairs a stainless steel case with 18k yellow gold. Cartier has sold the Tank Must line since 2021. A replica is not made by Cartier and holds no Cartier serial record. In the United States, selling one is a federal crime under 18 U.S.C. 2320. Buying one for personal use is not charged in most cases, but US Customs and Border Protection can seize and destroy the watch at import, and the buyer loses the money.

The genuine Tank Must two tone

The Tank shape dates to 1917. Louis Cartier drew the case lines from the tracks of a Renault FT tank seen from above. Cartier replaced the Tank Solo with the Tank Must in 2021. Tank Must cases are stainless steel. The movement is quartz, not mechanical. Case sizes are small and large, with a mini size added later. Cartier list prices for steel Tank Must models sit in the low thousands of US dollars. Two tone models cost more. Cartier sets prices and changes them, so confirm the current figure at a Cartier boutique.

Cartier lists two tone Tank Must references that mix steel with 18k yellow gold. Metal content, case size, dial and strap differ by reference number.

What US law says

  • 18 U.S.C. 2320 covers trafficking in counterfeit goods. A first offense carries up to 10 years in prison and a fine.
  • The Lanham Act, 15 U.S.C. 1114, lets a trademark owner sue a seller for damages and profits.
  • CBP seizes goods that carry counterfeit trademarks at US ports. The personal use exemption that applies to some goods does not apply to counterfeits.
  • Cartier does not service counterfeit watches. A replica has no manufacturer warranty and no resale market at auction houses.

Points to check on a two tone Tank Must

  • Bezel metal. The gold part is solid 18k gold, not plating. Plating rubs off at corners and shows gray steel underneath.
  • Crown. Cartier sets a synthetic spinel cabochon in the crown. Copies use glass or plastic, and the stone sits high or falls out.
  • Dial print. Roman numerals and the Swiss Made line are crisp on a real dial. Copies show thick strokes and ink spread.
  • Hands. Real hands are blued steel with a mirror finish. Copies are painted blue and look flat under light.
  • Caseback. Reference and serial numbers are stamped deep and even. Cartier can confirm a serial. A number that does not match Cartier records means the watch is not genuine.
  • Bracelet. Steel and gold links fit with tight gaps and carry a signed clasp. Copies show wide gaps and shallow stamps.

Risks

Water resistance on a replica is unverified. Gaskets may be missing. The case may contain nickel or lead in unknown amounts. Plating wears within months of daily use. Repair shops that work on Cartier watches turn away counterfeits, and parts do not interchange with genuine components.

Short answer

If the goal is a steel and gold Tank Must on the wrist, the legal path is a genuine watch from Cartier or a pre-owned dealer, or a different brand at the replica price point. A replica cannot be serviced, cannot be resold, and can be seized.