Short answer

A "replica Cartier Tank 2370" is a counterfeit copy of a Cartier watch. Cartier does not make it. In the United States, importing, selling, or trafficking counterfeit goods is a federal crime under 18 U.S.C. 2320, and a civil violation under the Lanham Act. U.S. Customs and Border Protection can seize and destroy the shipment. A buyer who pays an offshore seller can lose both the watch and the money.

What the reference number means

Cartier stamps a case reference number on the caseback of its watches. The number identifies case size, metal, and movement type for that model line. I could not confirm from public records that "2370" maps to a specific Cartier Tank variant. Cartier does not publish a complete public archive of reference numbers. The check that works is Cartier client service or a qualified watchmaker with the watch in hand.

Common signs a listing is counterfeit

  • Price far below the used market for the same reference. A steel Cartier Tank on the secondary market runs into the thousands of dollars.
  • No serial number, or a serial number that does not match the caseback engraving.
  • Stock photos only, with no photo of the actual caseback or movement.
  • Warranty card printed with no dealer name and no date.
  • Dial printing with uneven spacing, or a crown cabochon with the wrong shape.

Legal exposure

Trafficking in counterfeit goods carries up to 10 years in prison for a first offense and fines under 18 U.S.C. 2320. The Lanham Act, 15 U.S.C. 1114, lets the trademark owner sue for damages, lost profits, and attorney fees. CBP seizure does not need a court order. Card networks often deny chargebacks when the seller is outside US jurisdiction, and replica sellers give no warranty and no return path.

What to do instead

  1. Buy from an authorized Cartier dealer, or from a seller with a documented service record.
  2. Ask for photos of the caseback, the movement, and the full serial number.
  3. Verify the reference number with Cartier client service before you pay.
  4. For vintage pieces, buy from auction houses that authenticate before sale.

Key facts

  • Cartier is a registered trademark. Registration covers the name, the dial layout, and the case shape.
  • CBP seizes counterfeit goods across all categories at US ports each year.
  • A counterfeit watch has no manufacturer service, no parts supply, and no resale value in the legitimate market.