A fake Cartier Tank Must with a green dial usually fails in three places: the lacquer finish on the dial, the cabochon set into the crown, and the engraving on the caseback. Check those three points first. If any one of them is wrong, stop and treat the watch as counterfeit, no matter how good the rest of the package looks.
Start With the Green Dial
The real dial is lacquered, not painted. It reads as a deep, even, glassy green with a light sheen that shifts under a lamp but never looks patchy or dusty.
- Tilt the watch under a bright lamp and look for orange peel texture, mottling, or a sprayed plastic gloss.
- Check the Roman numerals. Edges should be crisp and uniform, with no ink bleeding into the lacquer.
- Read the CARTIER signature at 12 o'clock and SWISS MADE at 6 o'clock. Letter spacing is even and stroke width is consistent.
- Look at the VII numeral for the brand's secret signature worked into the numeral. Fakes often omit it, enlarge it, or place it wrong.
- Inspect the sword hands. They should be polished, free of burrs, and lined up with the minute track.
Inspect the Crown and Cabochon
Cartier fits a faceted blue cabochon to the steel Tank Must crown. Look for a hard, clean facet edge and a stone that sits flush in its seat. A dull dome, a plastic bead, a visible glue ring, or a stone that rattles means the watch is not genuine. The crown itself should turn smoothly and set the hands without slack.
Measure the Case
The large green dial Tank Must measures roughly 33.7 mm across the case and about 25.5 mm wide, and it wears thin because the movement is quartz. Use calipers if the seller allows it. A case that is noticeably thicker, heavier, or wider than those figures is a strong sign of a generic replica case.
Run a finger along the case edges. Genuine finishing blends polished surfaces into one another without a hard ridge or a wavy line where the polishing wheel stopped.
Read the Caseback Engraving
The caseback is held by four screws and carries the reference number, the serial number, STAINLESS STEEL, WATER RESISTANT, and SWISS MADE. Genuine engraving is laser cut, shallow, and razor sharp. Fakes show deep stamping, uneven depth, fuzzy letterforms, or a serial that repeats across many listings.
Check the Strap and Buckle
- Strap leather is calfskin in a green tone that matches the dial, with even stitching and sealed edges.
- Spring bars are quick release and sit flush in the lugs.
- The ardillon buckle is steel, correctly proportioned, and engraved CARTIER with the same letterforms as the dial.
Weigh the Price and Papers
The steel quartz Tank Must sells at retail for roughly three thousand US dollars and up. An offer far below that, from a seller with no boutique receipt or warranty card, is a counterfeit offer. Cartier does not distribute through unauthorized resellers, so a claimed new watch with no paperwork has no verifiable history.
Counterfeit watches also carry legal risk. United States Customs and Border Protection can seize counterfeit branded goods at the border, and trademark counterfeiting exposes buyers and sellers to civil and criminal penalties.
Final Verification Steps
- Photograph the dial, crown, caseback, and buckle in daylight.
- Compare each photo against the official Cartier product images for the green Tank Must.
- Ask the seller for the reference number and serial, then confirm the reference matches the green dial configuration.
- Take the watch to a Cartier boutique or a trained watchmaker who can open the caseback.
- Confirm the movement type and caseback markings before any money changes hands.