Short answer
"Replica Ballon Bleu 33660" is a seller code, not a Cartier reference. It points to a copy of the Cartier Ballon Bleu chronograph, the 42 mm steel model with two counters and a date window. The number 3366 is a case back stamp used on that model. The trailing zero is a listing habit. No Cartier catalog prints 33660.
Cartier built the Ballon Bleu in 28, 33, 36, 37, 40 and 42 mm cases. The chronograph sits at the top of that range. Published specs put the case at 42 mm with a thick profile, a fluted crown guard, and a blue spinel cabochon set into the crown. Confirm each number against a current Cartier spec sheet before you compare any sample.
What the genuine watch does
- Steel case, 42 mm, sapphire crystal front and back.
- In-house automatic chronograph movement, Cartier caliber 1904-CH MC.
- Silver guilloche dial, Roman numerals, blued sword hands.
- Two subdials for elapsed time plus a date aperture.
- Water resistance rated at 30 m or 50 m depending on the version.
How the copies break down
Listings sort into three groups. Budget copies run about $60 to $120 and use quartz movements. Mid copies run about $150 to $300 and use Asian automatic movements, often a 7750 derivative. Top copies run about $350 to $600 and add a closer dial, a sapphire crystal, and a movement with a decorated rotor.
Subdial placement is the first tell. A 7750-based movement puts counters at 12, 6 and 9. If the genuine dial places counters at 3 and 9, a 7750 copy cannot match without a module. Ask for a straight-on dial photo and compare it to a dated photo of the genuine watch.
Inspection points
- Case back stamp: depth, font, and the placement of 3366 above the reference line.
- Crown cabochon: shape, color, and how it seats in the fluted guard.
- Dial print: Roman numeral thickness and the spacing of the Cartier signature.
- Hands: color of the blued finish, and whether the chronograph hand resets to zero.
- Chronograph action: start, stop, reset. A sticky reset points to a worn or low-grade module.
- Weight and thickness: a light case with a thin profile signals a quartz build.
Legal and shipping notes
Counterfeit watches are seizable at the U.S. border. CBP can hold and destroy shipments of goods that carry a protected trademark. Selling a replica as a genuine Cartier is a separate offense. Treat any offer of box and papers with a replica as a red flag, since the paperwork will not match the watch.
Unknown: exact factory sources for most listings. Sellers rarely name the plant, and the same code can ship from different workshops across batches.