What is the Cartier Tank Must Large?
The Cartier Tank Must Large is a stainless steel quartz dress watch measuring 33.7 mm by 25.5 mm, sold by Cartier on a leather strap or a steel bracelet. "Large" is one of three case sizes in the Tank Must line, so it is a size label rather than a men's model. Watches marketed as a "replica Cartier Tank Must Large" copy the outline but are not made by Cartier, carry no warranty, and cannot be legally sold or imported into the United States.
Is a replica Cartier Tank Must Large legal in the US?
No. US law bars trafficking in counterfeit trademarked goods, and Customs and Border Protection can seize replica watch shipments at the border. Buyers usually lose both the watch and the money, and sellers face criminal penalties under the Trademark Counterfeiting Act. A replica also has no resale market, no service network, and no spare parts support from Cartier.
How big is the Tank Must Large, and how does it wear?
The case measures 33.7 mm x 25.5 mm and about 6.6 mm thick, so it sits on the wrist much smaller than a 34 mm round watch. The slim rectangular profile slides under a shirt cuff, which is the main reason the design has lasted a century. Cartier lists the Large at roughly $3,050 to $3,600 depending on strap or bracelet, and pre-owned examples typically sell for about $2,200 to $3,000.
How can you tell a genuine Tank Must Large from a counterfeit?
- Caseback markings: genuine watches carry "Cartier", "Swiss Made", the reference number for that exact configuration, and a serial number that matches the paperwork.
- Dial printing: the Roman numerals and the hidden "CARTIER" signature inside the numeral VII are crisp and evenly spaced on genuine dials.
- Crystal: Cartier fits sapphire crystal, while most replicas use mineral glass that scratches and hazes.
- Movement: the Tank Must runs a Cartier quartz caliber, and the seconds hand lands exactly on the printed markers.
- Paperwork: a boutique receipt, certificate and box are hard to fake convincingly, and Cartier can authenticate a watch at any boutique.
What should you buy instead?
Certified pre-owned is the most direct route to a real Tank Must Large at a lower price, and it keeps a service history. If the budget will not stretch that far, a new quartz dress watch from a mainstream brand offers similar proportions with a warranty and real service support. Vintage Must de Cartier models from the 1970s and 1980s are also genuine Cartier watches and often cost less than a modern example.
Quick answers
Is a replica Tank Must waterproof? Cartier rates the genuine watch at 3 bar for splashes only, and replicas usually have poorly sealed cases that fog and corrode.
Do replicas hold value? No. Genuine Tank Must watches trade actively on the used market, while counterfeits have no resale value at all.