A "fake Cartier Tank 2370" is a counterfeit watch built to resemble a Cartier Tank model that carries the case reference number 2370. Cartier did not make it, and in the United States it cannot legally be sold or imported as a genuine Cartier product. The phrase shows up mostly in replica listings and resale ads, so it helps to know what the number actually refers to and how to check a watch before any money changes hands.
What the reference number 2370 refers to
Cartier engraves a case reference number on the back of its watches. That number points to a specific case size, movement type, and production generation inside the Tank family. Cartier has used many reference numbers across the Tank line over the decades, and a four digit stamp on its own does not confirm a model, a production year, or authenticity. Two watches can share a reference number and still differ in dial, bracelet, or movement depending on the year they were made.
If you want to confirm what a specific reference should look like, the reliable route is Cartier directly or a watchmaker who services the brand. Auction archives and collector forums can help, but they mix real listings with replica listings, which is exactly how confusing terms like this one spread.
Why this search term exists
- Buyers looking for a low cost Tank style watch often search the reference number plus the word fake.
- Resellers label replica listings with genuine reference numbers to appear in more searches.
- Collectors search it to learn what warning signs to look for before buying pre-owned.
The same three words can lead to very different pages, so treat any listing that leans on the reference number alone as a prompt to verify rather than a reason to trust.
How to check a Cartier Tank before you buy
- Caseback engraving. Genuine stamping is crisp, evenly spaced, and consistent with the case material. Soft, shallow, or uneven lettering is a warning sign.
- Dial printing. Look at the Cartier signature under magnification. Letterforms should be sharp and consistent, not thick or crowded.
- Crown and cabochon. The crown should sit flush against the case and the blue cabochon should be smooth and correctly seated.
- Proportions. Compare the case against published dimensions for the model, since many replicas run slightly thick or slightly long.
- Movement. A watchmaker can identify the movement and confirm whether it matches what the reference should contain.
- Papers and service history. Ask for the original purchase documentation, service receipts, and serial numbers, then cross check them.
- Independent authentication. Pay for an inspection before final payment when the amount is significant.
Legal and practical risks in the US
Counterfeit watches infringe Cartier's trademarks. US customs authorities can seize and destroy counterfeit merchandise at the border, and selling counterfeit goods as genuine exposes a seller to civil liability. Buying one also carries practical costs beyond the price: brand service centers generally decline to work on counterfeit watches, spare parts are not available through official channels, and the watch has essentially no resale value because no reputable dealer will take it in trade.
There is also the everyday risk of paying genuine money for a watch that arrives with a different movement, a plated case, or water resistance that does not hold up. Those problems often appear months later, after any return window has closed.
Alternatives worth considering
If a Tank style case is what you want, the safer paths are a pre-owned authentic Tank from a dealer with a return policy, a well documented vintage piece, or an entry level mechanical watch from a brand that sells rectangular cases at a lower price point. None of these options pretend to be something they are not, and each one can be serviced, insured, and resold.
When a listing describes a Cartier Tank 2370 as fake, replica, or inspired, read that as a statement about the product rather than a discount. The reference number tells you what the watch imitates. It says nothing about who made it.