Quick answer
A fake Ballon Bleu 36mm copies the Cartier Ballon Bleu de Cartier mid-size watch. The case measures 36 mm across. Cartier introduced the line in 2007. Genuine steel 36 mm automatics sell at US boutiques in the $6,000 to $8,000 range. Replica listings run from $80 to $400. No replica holds a Cartier movement.
Genuine 36mm specs to compare
- Case width: 36 mm. Cartier also sells 33 mm, 37 mm, 40 mm, and 42 mm versions.
- Case thickness: about 12 mm on automatic versions. Quartz versions sit thinner.
- Crystal: sapphire, domed.
- Crown: at 3 o'clock, under a curved guard, set with a blue synthetic spinel cabochon.
- Dial: silvered opaline, Roman numerals, blued steel sword hands, minute track.
- Water resistance: 30 m (3 bar).
- Movement: automatic calibre 076 (ETA 2892 base) on most automatic 36 mm models.
- Bracelet: steel or alligator leather.
Tells on replicas
- Cabochon. Genuine spinel is deep blue and dome shaped. Fakes use glass or plastic. Color drifts purple or pale.
- Crown guard. The genuine guard is one continuous curve off the case flank. Fakes show a seam, a sharp edge, or a thin lip.
- Dial print. Genuine Roman numerals have sharp corners. Fake print is thick, and the VII numeral sits wrong on many copies.
- Date window. Automatic 36 mm models place the window at 3. Copies place it at 4:30.
- Case back. Genuine engraving carries a unique serial and reference. Fakes repeat one number across a batch.
- Thickness. Measure with calipers. A quartz fake sits 2 mm to 3 mm thinner than an automatic.
- Movement. A genuine 076 shows Geneva stripes, blued screws, and a signed rotor. Fakes use Miyota, Seagull, or unbranded quartz.
- Weight. Genuine steel on a bracelet uses solid links. Fake bracelets use hollow links and feel light.
What each price tier buys
Below $100: quartz movement, mineral glass, plated case, dial misalignment. $150 to $300: automatic movement, sapphire crystal on some units, better dial print. $300 to $450: closer case shape and engraving, still no Cartier parts. Sellers use labels like 1:1, clone, and first copy. Those labels describe a seller tier, not a factory standard.
Legal position in the US
US Customs and Border Protection seizes counterfeit watches at import. 19 U.S.C. 1526 covers seizure and forfeiture. 18 U.S.C. 2320 sets up to 10 years in prison for trafficking in counterfeit goods. Cartier does not service or authenticate replicas. Authorized dealers and auction houses will not take them.
Checks before payment
Ask for the case reference, a caliper photo of thickness, and a movement photo with the case back off. If the seller sends no photos of the actual unit, treat the listing as unknown. Match any claimed reference number against Cartier's own product page. Genuine 36 mm prices move with steel and gold markets, so pull the current retail figure on the day you compare.