Short answer
Fake Rotonde 4046 is a listing code, not a watch model. Cartier does not use four-digit reference numbers. Real Cartier references look like W1556368 or W6920054. Sellers of replica watches use short numeric strings such as 4046 to label their own stock. The code points to copies of the Cartier Rotonde de Cartier line.
What the Cartier Rotonde is
Rotonde de Cartier is a round-case collection from Cartier. The name comes from the French word for round. Past and current models include the Rotonde de Cartier Astrotourbillon, the Rotonde de Cartier Annual Calendar, the Rotonde de Cartier Chronograph, and the Rotonde de Cartier Mysterious Hour.
Genuine pieces start near $10,000 for a gold chronograph and pass $300,000 for high-complication versions. Cartier lists each watch on its own site with a full reference, a case size, and movement details.
Where 4046 comes from
Replica sellers invent their own codes. Patterns vary. Some use three digits, some four, some add a letter prefix. The code changes when a seller switches factories or case versions. Two sellers can offer the same copy under two different numbers. No Cartier catalog, auction archive, or service record lists a Rotonde with the reference 4046.
A search on that number returns listing pages, forum threads, and video reviews. Those pages point to seller catalogs, not to Cartier.
How to check a reference number
- Read the caseback. Cartier engraves a full reference, a case number, and a serial number.
- Enter the reference on cartier.com. A real reference returns a product page or an archive record.
- Contact Cartier client service. Staff can confirm a reference and a serial number.
- Check auction archives from Phillips, Christie's, or Sotheby's for the same model.
A number that appears in no Cartier source is a seller code.
Legal status in the United States
Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. A first offense carries up to 10 years in prison. Repeat offenses carry up to 20 years. Civil damages under the Lanham Act reach $2 million per counterfeit mark for willful use.
U.S. Customs and Border Protection can seize counterfeit watches at the border. CBP annual reports place watches and jewelry among the top categories by seized value. Import of a counterfeit watch for personal use is prohibited, and the item can be destroyed.
What the code does not tell you
A code such as 4046 says nothing about the movement, the case metal, the crystal, or the finish. Listing photos are often shots of a genuine watch. Review sites that rank replica sellers often take payment for placement. Return policies on replica sites are short or absent.
Market context
Replica Cartier watches sell from about $100 to $1,500. Sellers of super clone versions claim Swiss or Japanese movements, 904L steel cases, and sapphire crystals. No independent lab publishes test results for these watches. A buyer has no way to check the claims before purchase.