A fake Ballon Bleu 31610 is a counterfeit of the mid-size Cartier Ballon Bleu de Cartier automatic, the steel model sellers list under case reference 31610. A genuine example has a fluted crown capped by a blue synthetic spinel cabochon, deep and sharp caseback engraving, and a mechanical movement beating at 28,800 vibrations per hour. Counterfeits miss at least one of those three marks, which makes the crown, the caseback, and the movement the fastest places to catch one.
What does the reference number 31610 actually mean?
The number 31610 is a case reference stamped on the back of the mid-size Ballon Bleu, not a full Cartier sales code. Cartier sells the watch under W-prefixed codes such as W69011Z4, so a listing that shows only 31610 and no W-code is incomplete. Genuine 31610 cases pair that stamp with a unique serial number and a matching warranty card.
How can you tell a fake Cartier Ballon Bleu 31610?
Does the crown cabochon look right?
Cartier sets a faceted blue synthetic spinel into the crown, seated flush inside the crown guard. Fakes use glass or plastic that sits proud, looks milky, or wobbles when touched. The bezel should flow into the crown guard as a single continuous curve, with no seam or step.
Are the caseback engravings crisp?
Genuine engraving is cut deep with clean edges and correct spacing between characters. Counterfeit backs often show shallow laser etching, fuzzy letterforms, or a serial number repeated across multiple watches. Compare the serial on the caseback with the one printed on the warranty card, and run a finger over the caseback seam to feel for a gap.
What movement should be inside?
The automatic 31610 runs a Cartier calibre 049, based on an ETA 2892, at 28,800 vibrations per hour. That rate gives a smooth sweeping seconds hand, while many fakes use 21,600 vph movements that visibly stutter. A quartz movement in a steel mid-size Ballon Bleu is a red flag, since that size and material did not ship as quartz in this reference family.
Can you find the secret signature on the dial?
Cartier hides the word Cartier inside the Roman numeral VII at the 7 o'clock position. Genuine print is fine and consistent, and the numeral strokes stay sharp under magnification. Fakes show blotchy printing, oversized numerals, or hands in the wrong blue tone with rough edges.
How does the bracelet and clasp finish compare?
Genuine links alternate brushed and polished surfaces with even transitions and snug end links. Counterfeit bracelets rattle, show tool marks, or use pins where the real watch uses screws. The clasp engraving should match the caseback in font weight and depth.
Is a cheap 31610 ever real?
A genuine steel Ballon Bleu holds value, so a price far under the used market almost always signals a counterfeit or a stolen watch. Sellers using terms like 1:1, AAA, or mirror quality are describing copies by definition. Ask for a movement photo, a caseback close-up, and the original box and papers before paying anything.
What should you do if you already bought a fake?
Stop wearing the watch, photograph every angle, and open a dispute quickly if you paid through a platform. A Cartier boutique or an independent watchmaker can document the authentication findings in writing, which strengthens a chargeback. Report the listing so the same case reference stops circulating.
Frequently asked questions
Does a fake Ballon Bleu 31610 use sapphire crystal?
Most do not, and instead use mineral glass that distorts at the edges and scratches easily. The water droplet test is unreliable, so judge the crystal by its reflection and edge clarity instead.
How much should a genuine Ballon Bleu 31610 cost?
Pre-owned steel prices vary with condition, box, and papers, and full sets sell for more than watch-only examples. Verify current sold listings rather than asking prices, since asking prices run high.
Can a jeweler authenticate it while I wait?
A watchmaker can open the case, photograph the movement, and confirm the beat rate within minutes. That service costs little compared with the loss on a counterfeit.