Short answer
"Fake Rotonde 4000" is a search term. It is not a Cartier model name, and it is not a Cartier reference number. Cartier does not list a Rotonde with the number 4000 in its catalog. The phrase mixes three things: a replica watch, the Cartier Rotonde case shape, and a number that sellers use as a price.
In Chinese replica listings, 4000 means CNY 4,000. That is about USD 550 at an exchange rate near 7.2. In US listings, 4000 means USD 4,000. Those two readings sit in different parts of the market.
What the Cartier Rotonde is
The Rotonde de Cartier is a round-case line. Cartier builds most models in 40 mm and 42 mm cases. Dials carry Roman numerals, a guilloché or flinqué pattern, and blued steel hands. The crown holds a blue cabochon, cut from spinel or sapphire depending on the model. Movements in the line include the in-house 1904 MC automatic and the 1904-CH MC chronograph.
Replica price tiers
- Under USD 150: quartz movement, mineral glass, stamped dial, plated case.
- USD 200 to 500: Asian automatic such as Seagull or Hangzhou, sapphire crystal, closer case profile, cabochon in plastic or glass.
- USD 500 to 900: Miyota 9015 or a decorated clone, engraved case back, closer dial pattern, real spinel on some builds.
- USD 1,000 and up: the "super clone" tier. Movement decoration copies the MC layout. Case and dial hold up at arm's length.
A USD 4,000 replica sits far above this range. That budget reaches pre-owned genuine watches from several brands. A CNY 4,000 replica sits in the USD 500 to 900 band.
What to check
- Case diameter. Measure it with calipers. Genuine Rotonde cases run 40 mm and 42 mm.
- Movement beat rate. A genuine 1904 MC runs at 28,800 vph (4 Hz). Many fakes run at 21,600 vph (3 Hz).
- Crown cabochon. Genuine stones are spinel or sapphire. Plastic shows a flat, dull surface under light.
- Dial pattern. Guilloché lines are cut into the metal. Printed lines sit on top of the surface and blur under a loupe.
- Serial and reference. Cartier stamps both on the case back. Replica batches repeat the same numbers across many units.
- Case back engravings. Laser etching looks shallow and gray. Genuine engraving is cut deeper with cleaner edges.
Legal note
Importing counterfeit goods into the US is prohibited. U.S. Customs and Border Protection seizes such shipments. Selling counterfeits is illegal under trademark law. Cartier does not service, authenticate, or repair replica watches, and no replica carries a valid manufacturer warranty.