Short answer
"V6" is a seller label. Cartier does not issue version numbers for the Tank Must. The tag marks the sixth iteration that a factory or reseller claims to sell of its copy of the 2021 Tank Must. No public registry confirms the number. Two sellers can use "v6" for two different watches with different parts.
fake cartier tank must 2021 v2
The watch being copied
Cartier released the Tank Must in 2021 as the replacement for the Tank Solo. The line sits in steel, not gold. The Large case measures 33.7 mm by 25.5 mm and 6.6 mm thick. The Small case measures 29.5 mm by 22 mm. Both run on quartz. The dial is silvered opaline with Roman numerals and blued steel sword hands. The crown carries a sapphire cabochon. Water resistance is 30 m. Crystal is sapphire.
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A second variant, the Tank Must SolarBeat, charges from light through a photovoltaic cell. Cartier states the strap uses plant-based material. That variant adds a step for any copy: the solar movement and the strap are separate supply problems.
What sellers list for a v6 unit
- Case: 316L steel, often quoted at the same dimensions as the genuine Large
- Movement: quartz, sourced from Ronda, Seiko, or an unnamed plant
- Crystal: mineral glass on most units, sapphire claimed on some
- Crown: steel with a spinel or glass cabochon, not sapphire
- Dial: pad-printed numerals, not transferred
- Strap: leather or a steel bracelet with a folding clasp
None of these claims come with a test report. Sellers set the version number. A higher number does not prove a better part.
Fake Cartier Tank Must 2021 V7: What to Check Before You Buy
Points to check on any sample
- Thickness at the case middle. Copies often run 0.5 mm to 1 mm thicker.
- Dial print. Look at the Roman numeral strokes and the minute track.
- Hand shape. Genuine sword hands taper to a point.
- Cabochon color and seat. The stone should sit flush.
- Caseback screws and engraving depth.
- Bracelet end links and clasp stamping.
Legal status in the US
Goods that carry a registered trademark without authorization are counterfeit. Importing or selling them is illegal under 18 U.S.C. § 2320. US Customs and Border Protection seizes shipments at the border. Richemont, Cartier's parent company, files civil suits against sellers. A personal purchase does not make the item legal to resell, and the shipment can still be seized.
What is not known
There is no public data on production volume, movement origin, or steel grade for any version. Factory names used in this market are aliases. Treat any claim that a v6 exists as a fixed, audited specification as unverified.