Quick answer

The Cartier Tank Must is a steel quartz watch that Cartier launched in 2021. The steel models use a silvered dial that reads white in most photos and in daylight. Cartier sells no model called the "Tank Must White." Listings with that phrase describe a replica of the steel Tank Must with the white or silvered dial.

Those replicas are counterfeit goods under US trademark law. Federal law bans their import and their sale. That covers the seller first, but the buyer takes on shipment seizure, a watch with no factory support, and no legal resale channel.

Genuine Tank Must specs

Cartier lists the Tank Must Large at 33.7 mm by 25.5 mm, with a case thickness of 6.6 mm. The Small version measures 29.5 mm by 22 mm. Both run on quartz movements. The case is steel. The crystal is sapphire. The crown carries a blue spinel cabochon. Water resistance is 30 m, which covers splashes and not swimming.

Reference WSTA0041 is the Large model on a black calfskin strap. Reference WSTA0042 uses a steel bracelet. Cartier also sells the Tank Must SolarBeat, which uses a photovoltaic movement and a strap made with apple waste. Retail prices for the steel models on a strap sit above $3,000. Cartier sets and changes prices, so the figure moves.

What "white" refers to

Cartier describes the stock dial as silvered. Product photos render it as white. Some vintage Must de Cartier models from the 1970s and 1980s used a lacquer dial with a warmer tone, and sellers borrow that look for the word "white." Neither Cartier nor auction archives list a current reference named Tank Must White.

How replicas differ

  • Movement: the genuine watch uses a Cartier quartz caliber. Many replicas use unbranded quartz, and "automatic" replicas of a quartz-only model use low-cost clone movements.
  • Case finish: replica steel is softer, and brushing lines and bevels sit at different angles from the Cartier finish.
  • Dial print: the weight and spacing of the Cartier name and the minute track vary. Cartier hides the brand name inside a Roman numeral on Tank models, and the placement of that print is a marker.
  • Caseback: genuine watches carry a unique serial number. Replica batches repeat the same number across many units.
  • Serial check: Cartier boutiques and service centers can confirm a reference and serial against factory records.

US legal status

18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime. Penalties for a first offense reach 10 years in prison and $2 million in fines for an individual, or $5 million for a corporation.

The Lanham Act, 15 U.S.C. § 1114, gives trademark owners civil claims. Statutory damages run up to $200,000 per counterfeit mark for non-willful conduct and up to $2 million per mark for willful conduct.

19 U.S.C. § 1526 bars import of goods bearing a counterfeit mark. US Customs and Border Protection inspects shipments, and it seizes and destroys counterfeit items. Watches appear as a recurring category in the agency's seizure reporting.

What buyers run into

  • No Cartier warranty. Service centers decline counterfeit watches, so repairs go to independent shops that source non-original parts.
  • No resale market. Auction houses and authenticated resale platforms reject counterfeits, and listing sites remove them.
  • Unverified water resistance. A replica marked "5 ATM" has no test record behind the claim.
  • Border loss. CBP can seize the shipment, and the money spent is gone.

Buying a real one

The steel Tank Must is an entry model in the Cartier range. A buyer can check the reference on cartier.com, request the original invoice, and confirm the serial with a boutique. Warning signs include mismatched serials, a sealed case with no paperwork, a dial that reads white but carries blurry print, and a price far below retail. Cartier boutiques offer authentication and quote service prices on request.