Cartier does not make a Tank Must chronograph. The Tank Must line returned to the catalog in 2021 as a time-only watch. It has two or three hands, Roman numerals, and a quartz, Solarbeat, or automatic movement. A listing that says "replica Cartier Tank Must chronograph" joins two names that do not meet in the real catalog. Cartier chronographs in the Tank family sit in other lines, such as the Tank Francaise Chronograph and the Tank Americaine Chronograph.
What the phrase describes
Sellers use the label for a watch that has no Cartier reference. The Tank Must case is a thin steel rectangle with brancards that taper into the lugs. A chronograph adds a movement module, two pushers, and subdials. Those parts raise case height, which changes the flat profile that defines the Tank shape. Most of these builds read as a Tank Francaise Chronograph or a generic rectangular chrono with a Cartier-style dial.
Movements found in these listings
- Quartz chronograph modules from Miyota or Seiko, seen at $60 to $150.
- Hand-wound Seagull ST19, a copy of the Venus 175 layout, seen at $150 to $300.
- Automatic movements with a bolted-on chronograph module, seen at $250 to $400.
Seller copy that says "Swiss 7750" or "in-house 1904-CH" cannot be confirmed from a photo. Ask for a movement photo with the caseback off, or a video that shows start, stop, and reset.
Dimensions to compare
Cartier lists the Tank Must Large at 33.7 mm by 25.5 mm and the Small at 29.5 mm by 22 mm. Case height on the quartz Tank Must is about 6.6 mm. Check current numbers on the Cartier site, since the brand has revised sizes across generations.
Chronograph builds run 10 mm to 13 mm thick in most listings. On a wrist that gap is visible from the side. If a seller quotes 7 mm for a chronograph, the number is wrong, or the subdials are printed on the dial with no working hands.
Checks before payment
- Run the chronograph. Subdial hands must reset to 12 at zero.
- Press each pusher. Start, stop, and reset need a firm click and a clean return.
- Pull the crown to each position. Winding and time set must engage without grinding.
- Measure the lug width. Tank Must straps sit at 19 mm or 20 mm on common sizes.
- Read the caseback engraving. Font, depth, and serial format vary between factories.
- Check the clasp and strap hardware for plating that flakes at the edges.
Price bands
Listings run from about $60 to $400. Higher prices buy steel plating thickness, sapphire crystal, and a better movement, in that order. No third-party audit confirms the materials at any price point. Plated brass and 316L steel look the same in a compressed product photo.
Legal status in the US
US law treats counterfeit watch trafficking as a federal crime. 18 U.S.C. Section 2320 covers trafficking in counterfeit goods. A first offense carries a maximum of 10 years in prison and a $2 million fine for an individual. CBP seizes counterfeit watches at ports and mail centers. Personal use is not a defense for import. Cartier is a registered trademark held by Compagnie Financiere Richemont, and the mark stays active.
Common questions
Did Cartier ever make a Tank Must chronograph?
No reference appears in the Tank Must line, in the 2021 relaunch or later.
Is a replica Tank chronograph water resistant?
Most sellers list 30 m. That rating covers splashes. Pushers and caseback gaskets on these builds are the first points of failure, and no factory publishes pressure test data.
Do replica Cartier watches hold value?
No. Resale markets for counterfeit goods are thin, and platforms remove listings on trademark complaints.