Short answer
The Ballon Bleu de Cartier 26mm is the smallest case in the line. Cartier builds it with a quartz movement, a 26mm steel case, a sapphire crystal, and a fluted crown under a curved guard with a blue cabochon. Fakes of this size sell from about $25 to $400. Most fail on the crown guard, the cabochon color, and the caseback engraving. The genuine watch lists near $4,000 on a strap, so a $120 copy is a different product, not a discount.
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Genuine specs to compare against
- Case: 26mm diameter, polished steel
- Thickness: about 9mm
- Movement: quartz
- Crystal: sapphire
- Water resistance: 30m
- Crown: fluted, blue synthetic spinel cabochon, set inside a curved guard at 3 o'clock
- Dial: silvered opaline, Roman numerals, blued steel sword hands, CARTIER below 12, SWISS MADE at 6
- Caseback: solid steel, screwed, engraved with reference, serial, and water resistance
What fakes get wrong
Crown guard. On the genuine watch the guard curves into the case and the crown sits flush. On low-tier fakes the guard is a separate piece with a visible gap at the seam.
Cabochon. Genuine is a synthetic spinel in deep blue with a domed cut. Fakes use plastic or glass. The color runs purple or flat navy.
Dial print. CARTIER should be thin and crisp. Fakes show thick letters with soft edges under a loupe.
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Hands. Blued steel reads dark blue with a slight sheen. Painted hands read bright blue.
Caseback. Genuine engraving is cut deep with clean edges. Fake engraving is laser-etched and shallow.
Movement. The 26mm is quartz. A listing that calls a 26mm case automatic is a wrong description or a different model.
Fake tiers and price
- $25 to $60: alloy case, plastic cabochon, printed dial, no serial
- $80 to $180: steel case, quartz, decent dial print, wrong crown guard profile
- $200 to $400: closer case shape, sapphire crystal on some units, engraved caseback, cabochon still off in color
Above $400 the price stops matching the build. No fake carries a Cartier warranty or factory service.
Checks before you pay
- Ask for a side photo of the crown. The guard seam is the first tell.
- Ask for a macro shot of the dial at 12 and at 6.
- Ask for the caseback serial and reference. Compare the font to catalog photos.
- Ask for a video with the second hand running. A quartz tick matches the 26mm; a smooth sweep does not.
- Ask what happens on seizure. Sellers who ship from outside the US often do not refund a customs loss.
Legal and practical notes
In the US, selling or importing counterfeit goods is illegal under the Trademark Counterfeiting Act. CBP can seize a package and send a notice to the address on the label. A buyer of one personal item is unlikely to face federal charges, but the watch can be destroyed and the payment is gone. Cartier does not service fakes. A jeweler who opens the case may refuse the repair once the movement is identified.
Treat any listing that promises box, papers, and a Cartier serial as a claim, not proof. Serial numbers on fakes are copied from real watches, so a matching number proves nothing.