Fake Ballon Bleu 31610 is a seller-side catalog code, not a Cartier reference number. Genuine Cartier references carry a W prefix, such as W69010Z4 for the 36 mm steel Ballon Bleu automatic, so a five-digit 31610 tag identifies a specific replica batch or factory listing. Treat that number as a quality label you still have to verify, not as proof of origin.
What does the number 31610 mean on a replica Ballon Bleu?
Replica sellers assign short numeric SKUs to separate production batches that share a case size, movement and finish level. In most listings, 31610 points to a 36 mm stainless steel automatic Ballon Bleu with a blue cabochon crown.
The 316 segment usually refers to 316L stainless steel, the marine-grade alloy used for most watch cases. It is a material note rather than a model number, and different sellers reuse it freely.
Which Cartier watch is being copied?
The Ballon Bleu de Cartier launched in 2007 and takes its name from the rounded, balloon-shaped case. Its signature details are the fluted crown capped with a blue sapphire cabochon and shielded by a curved crown guard.
Replica makers target the 33 mm quartz version, the 36 mm automatic and the 42 mm automatic. The 36 mm automatic is copied most often, which is why codes like 31610 usually describe that size.
What should you check on a 31610 Ballon Bleu replica?
- Case size and profile: the 36 mm automatic should measure close to 36 mm across and roughly 12 mm thick, with softly curved lugs and no sharp edges.
- Crown cabochon: the blue stone should sit centered in the fluted crown, with a deep synthetic sapphire look instead of flat painted plastic.
- Dial texture: the guilloché pattern should be cut into the dial, not printed, and Roman numerals should be crisp with no blur or bleeding.
- Crystal: sapphire with anti-reflective coating on a top tier build, mineral glass on cheaper batches, which scratches faster.
- Movement: a Swiss-style ETA 2824 clone, Miyota 9015 or Seiko NH35 signals a serious build, while a quartz tick means a budget unit.
- Bracelet and clasp: solid links, tight end-link fit against the case, and a folding clasp with clean engraving.
- Caseback: correct reference engraving, correct case number placement and readable laser etching.
Movement and materials: what separates tiers
Low tier replicas use quartz movements, mineral glass and plated base metal that wears through with daily use. Mid tier builds add a 316L steel case, sapphire crystal and an entry automatic movement.
High tier builds use a decorated automatic movement with a regulated rate, sapphire crystal on both sides and hand-finished brushing on the case. These are the versions that hold up to close inspection and daily wear.
How much should a fake Ballon Bleu 31610 cost?
Quartz versions typically sell for under 100 US dollars and show their price in the crystal, dial texture and clasp feel. Steel automatics with sapphire crystal generally run from roughly 200 to 500 dollars depending on movement and finishing.
Any listing claiming genuine Swiss parts at a fraction of retail is overpromising. Ask for real photos of the exact unit, a timegrapher readout and the weight in grams before paying.
Is 31610 a real Cartier reference?
No. Cartier reference numbers start with letters and mix letters with digits, and the Ballon Bleu line does not use a 31610 code. Any listing that presents 31610 as an official model number is mislabeling a replica listing.
Legal and practical note
Counterfeit watches infringe trademarks, and importing them into the United States can lead to seizure and civil penalties. Buyers should understand the risk before ordering, and sellers who market fakes as genuine face far heavier exposure.
If authenticity matters, buy from an authorized dealer or a certified pre-owned seller with paperwork, service history and a verified reference number.