Short answer
"Replica Ballon Bleu 33671" is a seller code, not a Cartier reference. Cartier reference numbers for the Ballon Bleu de Cartier line carry a letter prefix, such as W6920071 or CRW69010Z4. A bare five digit number such as 33671 does not appear in the Cartier catalog. It comes from a wholesale or reseller inventory system. I could not verify any Cartier model numbered 33671.
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What the code points to
Listings that use 33671 describe a counterfeit Ballon Bleu de Cartier. Most describe a 33 mm steel case with a silver dial and a steel bracelet. The genuine watch in that shape is the Ballon Bleu de Cartier 33 mm. Few listings publish the case diameter, the movement maker, or the case thickness. Buyers see photos, not measurements.
The genuine watch it copies
Cartier introduced the Ballon Bleu de Cartier in 2007. The design puts the winding crown inside a guard at 3 o'clock. A synthetic sapphire cabochon sits on top of the guard.
- Case sizes in the current catalog: 28, 33, 36, 40 and 42 mm.
- Materials: stainless steel, 18k yellow, rose or white gold, and steel combined with gold.
- Dials: guilloché silvered, blue, or white, with Roman numerals and blued sword hands.
- Crystal: sapphire on all sizes.
- Water resistance: 30 m on most versions.
- Movements: quartz in the 28 mm size, self-winding Cartier caliber 076 in the 33 mm automatic.
Movements found in replica listings
Three movement families show up in replica Ballon Bleu listings. Chinese automatic copies of the ETA 2824 pattern are the most common at low prices. A Miyota 9015 or a Seiko NH35 shows up in mid tier listings. A few sellers claim an ETA or Sellita movement, and the price jumps. Quartz versions exist for the 28 mm shape. Ask for a photo of the movement and the caseback before you pay.
Differences from the genuine watch
Replica cases run thicker than the 9.96 mm genuine 33 mm case on most listings. The cabochon is glass on cheap versions and synthetic sapphire on better ones. Dial printing, date font, crown threads, caseback engraving and clasp stamps are the parts that show the gap in photos. No replica carries a Cartier warranty, a Cartier service record, or resale value.
Legal position in the United States
Counterfeit watches are not legal goods. 18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime, with up to 10 years in prison for a first offense. U.S. Customs and Border Protection can seize shipments that carry counterfeit marks recorded with the agency. Cartier and other brands hold trademark registrations and enforce them.
What to check in any listing
- Case diameter and thickness in millimeters.
- Movement name, not the phrase "Swiss movement."
- Photo of the caseback and the clasp stamps.
- Return policy and payment method.
- A stated refund path if the item is seized at customs.