Short answer
A fake Cartier Tank Allongée is a watch that copies the Tank Allongée name and case shape but was not made by Cartier. The Tank Allongée is a vintage Tank with a long rectangular case. Cartier introduced the Tank in 1917. Allongée is French for lengthened. Cartier does not publish production totals for the Allongée, so the number built is unknown.
Case and crown checks
A standard vintage Tank measures about 23 mm to 25 mm across. The Allongée runs longer from lug to lug. Compare case proportions against auction catalog photos. Copies often sit wider or shorter than the original.
- Crown: Cartier fitted a cabochon to the winding crown. Vintage references use blue spinel or sapphire. Glass and plastic appear on copies.
- Caseback: French 18k gold cases carry assay marks, including the eagle head. Vermeil pieces from the Must de Cartier line carry a 925 silver stamp. A caseback with no stamp and no serial number is a problem.
- Weight: 18k gold feels dense in the hand. Brass with gold plating feels light.
- Lugs and screws: check that the lug shape matches the reference and that the caseback screws sit flush.
Dial and movement checks
Dial printing matters more than any other detail. The Cartier wordmark uses a serif face with tight letter spacing. Copies stretch the letters or swap in a different font. Check the Swiss Made text at 6 o'clock. Some Cartier dials hide a second Cartier signature inside the VII numeral or the X numeral. Not every reference has the hidden signature, so a missing signature proves little on its own.
Vintage Allongée watches used mechanical movements. Quartz movements reached Cartier watches in the 1970s. A quartz movement inside a case stamped with an older reference number is a mismatch.
Papers, boxes, and archive checks
Boxes and papers are easy to copy. Treat them as weak evidence. Cartier runs an archive service. The company inspects a watch and issues a certificate for a fee. A serial number that returns no record is a signal, not proof of a fake.
Words used in listings
Listings use the words replica, fake, and super clone. All three describe a watch that carries the Cartier name without Cartier's authorization. A homage is a different product. A homage copies the shape and carries no brand name and no logo. U.S. law treats the first group as counterfeit goods. A homage can still raise trade dress questions, but the trademark analysis differs.
Law in the United States
Selling a counterfeit watch is a federal crime. 18 U.S.C. Section 2320 covers trafficking in counterfeit goods. A first offense carries up to 10 years in prison and a $2,000,000 fine for an individual. Civil claims run under the Lanham Act, 15 U.S.C. Section 1114. Statutory damages reach $2,000,000 per counterfeit mark per type of goods when the use is willful. U.S. Customs and Border Protection can seize and destroy shipments at the border. Penalties depend on shipment size, prior offenses, and intent.
Checks before you buy
- Ask for a photo of the caseback stamps and serial number.
- Ask for a movement photo and the caliber number.
- Compare the dial font to a documented reference.
- Request the Cartier archive letter if the seller claims one exists.
- Pay with a method that allows a chargeback.