Short Answer

31610 is a seller or factory stock code, not a Cartier reference number. Two listings using 31610 can carry different cases, movements, and dials because the code belongs to the seller, not to the watch. Before you pay, confirm the factory name, case diameter in millimeters, movement model, crown cabochon material, and dial finish. If the seller cannot answer those five points in writing, the listing is not ready to buy from.

Prerequisites

  • Know the genuine size you want: the Ballon Bleu de Cartier comes in 28mm, 33mm, 36mm, 40mm, and 42mm cases.
  • Have the current listing page, price, and photo set open.
  • Set a budget range before you contact the seller, since factory tiers change the price by hundreds of dollars.

How to Evaluate a Replica Ballon Bleu 31610 Listing

  1. Ask the seller to name the factory that builds the 31610 unit and the version number of that batch.
  2. Request the case diameter in millimeters and compare it to a genuine Ballon Bleu size.
  3. Ask for the case thickness and check that it sits close to the genuine profile, since thick cases are the most common giveaway.
  4. Get the movement model in writing, such as a Japanese automatic, an ETA clone, or a decorated Chinese automatic.
  5. Check the crown: it should sit inside a fluted crown guard with a blue synthetic spinel cabochon, not a flat blue dot.
  6. Inspect a straight-on dial photo for the guilloche texture, then check that the printed logo and Roman numerals are crisp and centered.
  7. Look at the hands in a close-up: sword-shaped, blued steel, with no rough edges or burrs.
  8. Review the caseback engraving for depth, spelling, and correct serial placement.
  9. Check the bracelet or strap option, the clasp style, and whether the clasp engraving matches the case metal.
  10. Request QC photos of the actual unit with a dated card in the frame, not factory stock images.
  11. Confirm the return window, the shipping method, and the payment protection before sending money.

Movement Notes

A 28,800 vibration-per-hour automatic movement keeps a smooth sweep on the seconds hand. Lower-beat movements look choppy under a loupe and often run louder. Ask for a timegrapher photo if the seller offers one, and check the rate and amplitude numbers rather than trusting the description.

Red Flags

  • No factory name, only a price and a photo set.
  • Genuine Cartier packaging offered with a replica watch.
  • Photos that appear in several unrelated listings.
  • Refusal to send a live QC photo of the unit you will receive.
  • Payment by irreversible method with no return policy.

Note on Legal Risk

Replica watches are counterfeit goods in most markets, including the United States, and can be seized by customs. The information here covers how listings are checked for accuracy, not a guarantee of legality or safe delivery.