A "fake Ballon Bleu 33704" is a counterfeit Cartier Ballon Bleu with 33704 stamped on the case back. That number is the case reference buyers use for the 42 mm stainless steel automatic, the watch usually listed under the model code W69012Z4. Seeing 33704 engraved on a watch tells you almost nothing, because replica factories copy case-back numbers along with everything else. Authenticity comes down to the movement, the crown, the dial print, the engraving, and the paperwork.
What the 33704 stamp actually refers to
Cartier puts a case reference on the back of the Ballon Bleu, separate from the retail model number. Sellers lean on the case reference because it is short and easy to search. 33704 shows up on listings for the 42 mm steel automatic with a date at 3 o'clock. If someone is selling you a 36 mm or a two-tone watch and calls it a 33704, the description is already wrong.
Tells that show up on most copies
- Crown cabochon. The real crown carries a blue synthetic spinel set in a fluted crown. Copies use glass or dyed plastic, and the color runs either too purple or too flat.
- Dial. Genuine dials have a fine guilloche texture that shifts under light, sharp Roman numerals, and blued steel sword hands. Fakes show soft printing, uneven spacing, and hands that are painted rather than heat-blued.
- Secret signature. Cartier hides "Cartier" inside the VII numeral. Copies either omit it, place it wrong, or make it thick enough to read from across a room.
- Case finish. Look at the crown guard and the curve of the lugs. Copies often have a slightly thicker case and a crown that sits proud of the guard.
- Crystal. Sapphire with anti-reflective coating on the original. Mineral glass on most fakes, which shows more glare and scratches sooner.
- Weight. A 42 mm steel Ballon Bleu has real heft. Copies feel light in the hand and often have a hollow-sounding bracelet.
Movement, the part that is hard to fake cheaply
The 42 mm automatic runs Cartier calibre 049, an ETA 2892-A2 base finished for Cartier. Copies use unbranded Chinese automatics or, in the cheapest cases, quartz. A watchmaker can open the case back in two minutes and tell you which one you have. If a seller will not let a third party open it, that answers the question for you.
Why "super clone" marketing does not hold up
Sellers push phrases like 1:1, Swiss movement, or mirror quality. None of those are standards. There is no grading body, no factory name you can verify, and no two batches from the same source come out the same. Two copies bought a month apart from the same listing often have different cases.
Legal and practical risk in the US
Counterfeit watches are seized and destroyed by US Customs and Border Protection. Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320, and repeat sellers get prosecuted. For a buyer, the damage is smaller but real: no warranty, no service from Cartier or any authorized center, resale value near zero, and a watch that may not be water resistant no matter what the back says.
How to check a real one
- Buy from an authorized dealer or a seller with a documented service history.
- Match the serial on the case back with the paperwork and with the movement.
- Have a watchmaker or a Cartier boutique confirm the movement and the case.
- Ask for the original receipt and service records, not just a box.
What to ask before you pay
Ask for photos of the case back, the crown from the side, and the movement with the back open. Ask whether the watch has been serviced and by whom. Ask about the return window in writing. A seller with a genuine watch will answer all of that. A seller moving copies will stall on the movement photo every time.