Quick Pick
Buy the high grade. A high-grade fake Cartier Tank Must costs $210 to $290. It uses a Swiss quartz movement, 316L steel, and sapphire glass. The case matches the genuine large model at 33.7 mm by 25.5 mm and 6.6 mm thick. Budget and mid tiers fail on dial print, caseback screws, and crown stone.
What the Genuine Tank Must Uses
Cartier relaunched the Must line in 2021 as a steel entry model in the Tank family. The large steel version measures 33.7 mm by 25.5 mm and 6.6 mm thick. It runs a quartz movement. The dial carries printed Roman numerals on a lacquered surface. The crown holds a blue synthetic spinel cabochon. Cartier lists the steel large model at about $3,300 in the US. The SolarBeat version swaps the battery movement for a photovoltaic one and uses a strap made from apple waste. The Tank Must has no date window at any size.
Cartier Tank Must Fake vs Real: A Comprehensive Comparison
The Three Replica Tiers
High grade: $210 to $290
Movement is a Swiss quartz unit, often a Ronda 763. Case steel is 316L, sometimes 904L. Glass is sapphire with anti-reflective coating. Thickness sits between 6.6 mm and 7.0 mm. The caseback is engraved with correct serial font and flush screws. The cabochon is blue spinel, not plastic. The strap is calf leather with an alligator grain and a quick-release pin. Claimed water resistance is 30 m. Pressure tests at this tier hold 3 atm at best.
Mid grade: $120 to $180
Movement is a Ronda or Miyota quartz. Glass is mineral on most units, sapphire on some. Case measures 34 mm by 26 mm and 7.2 mm thick. Caseback engraving is shallow and serial numbers repeat across batches. The cabochon is glass. The strap is embossed cowhide with a glued buckle. Dial print for "Cartier" and "Swiss Made" is heavier than the genuine.
Budget: $50 to $90
Movement is a Chinese quartz. Glass is mineral. Case runs 35 mm wide and 8 mm thick, so it sits tall on the wrist. Caseback is laser etched with a shallow pattern. The cabochon is plastic and often black instead of blue. Crown threads strip in weeks. Water resistance is listed as 30 m and holds no pressure test.
Checks Before You Pay
- No date window. The genuine Tank Must has none.
- Case thickness under 7 mm.
- Cabochon is blue, faceted, and set in a steel crown.
- Back screws sit flush with the caseback surface.
- Roman numerals are printed thin, with even stroke weight.
- Strap pins release with a tool, not by prying.
Price and Legal Notes
Replica prices track movement type and case finish, not brand name. A $250 quartz Tank Must keeps time as well as a $3,300 genuine quartz Tank Must. The difference is material sourcing, finishing, and legal risk. US law, 18 U.S.C. 2320, treats trafficking in counterfeit goods as a criminal offense. Customs and Border Protection seizes counterfeit watch shipments at US ports. Buying one replica for personal use carries lower exposure than reselling. Resale carries federal penalties.
Verdict
Pick the high grade at $210 to $290 if the case profile and dial print matter. Pick the mid grade at $120 to $180 if the watch is a daily beater. Skip the budget tier. The 8 mm case and plastic stone show at arm's length.