The fake Cartier Tank Must with the green lacquer dial is one of the easier Cartier replicas to catch in person, and one of the hardest to judge from a listing photo. The real watch is steel, quartz, and mostly dial. There is no movement finish to admire and nowhere for a replica maker to hide. Everything rides on the green, the printing, and the case finishing.
Why the green Tank Must gets copied
- Steel case plus quartz movement: the inside of a fake costs almost nothing to match.
- Green lacquer photographs well, so listings look better than the watch does.
- Retail sits in the low four figures, which makes a few-hundred-dollar fake feel like a shortcut.
What the genuine watch actually is
The Tank Must Large measures about 33.7mm by 25.5mm and roughly 6.6mm thick. Steel case, green lacquer dial, sapphire crystal, fluted crown set with a blue synthetic spinel cabochon, and Cartier's high-autonomy quartz movement. It has two hands. No seconds hand.
That detail trips up a lot of buyers. The usual trick for spotting a fake, watching whether the seconds hand sweeps or ticks, does not work here. The real one and the fake are both two-handers.
Where replicas fall apart
The green
Genuine lacquer has depth. Tilt it and the color darkens and clears, and under warm indoor light it stays green. Most fakes read olive, or flat pastel, or slightly metallic because the dial is painted instead of lacquered over a base. This is the tell you can spot across a table.
The printing
Real Roman numerals are thin, even, and sharp at the terminals. Fakes get them thick, or slightly wobbly on the curves. Then there is the hidden signature: Cartier tucks a tiny "CARTIER" inside the VII numeral. Replicas usually smudge it into an unreadable mark or skip it entirely.
The case and crown
Look at the brancards, the vertical bars running along each side of the case. Genuine ones are polished flat with a crisp line where they meet the brushed surfaces. Fakes round that transition off. Crown fluting should be deep and even, with the cabochon sitting flush. Glass or plastic cabochons look too bright or too pale, and they sit proud of the crown.
The bracelet or strap
On the steel bracelet, end links should fit without gaps and the clasp should close with a firm snap. Fake clasps have slack, sharp edges, and shallow engraving. On a leather strap, the fake usually ships with something stiff and glossy that has nothing to do with Cartier's calf or alligator.
The back
Engraving quality is the giveaway nobody checks. Genuine caseback text is laser-etched and uniform. Fakes are often stamped, which leaves slightly raised metal and soft letters. Reference numbers and serials on fakes get reused across batches, so the same number shows up on listings from different sellers.
Quick checklist in hand
- Tilt the dial under two different light sources. Flat, olive green is wrong.
- Find the VII. The hidden CARTIER should be readable under a loupe.
- Run a fingernail along the brancard edge. It should feel like a sharp step, not a ramp.
- Check the cabochon for a proper dome, not a flat bead.
- Angle the crystal toward a window. Mineral glass shows more haze and rainbow distortion at the edges than sapphire.
The part listings leave out
Counterfeit watches are not grey-market Cartier. Selling them is trademark infringement in the US, and Customs can seize them at import. There is no Cartier service, no parts supply, and no resale market. A quartz fake that stops is a paperweight, while a genuine Tank Must quartz service is cheap and the watch holds value. If the green dial is what you actually want, that math matters more than getting the case shape close.