What the 24mm Ballon Bleu is

Cartier introduced the Ballon Bleu in 2007. The 24mm case is the smallest size in the line. Cartier builds it as a quartz watch. A replica is an unauthorized copy that carries the Cartier name without a license. In the United States, selling those copies is a federal crime under 18 U.S.C. section 2320.

Genuine 24mm specs

  • Case diameter: 24mm
  • Case thickness: about 7mm
  • Movement: Cartier calibre 057, quartz
  • Crystal: sapphire
  • Crown: fluted, set with a synthetic blue spinel cabochon
  • Water resistance: 30m, 3 bar
  • Dial: silvered opaline with a guilloche pattern, Roman numerals, blued steel sword hands
  • Case metals: steel, yellow gold, rose gold, white gold with diamonds

Cartier sells the 24mm on leather straps and on steel or gold bracelets. Cartier sets prices per market and updates them each year. US retail for steel quartz 24mm pieces sits in the four-figure range. Gold and diamond references cost more.

How 24mm compares to other sizes

Cartier makes the Ballon Bleu in 24mm, 28mm, 33mm, 36mm, 40mm, 42mm, and 46mm cases. The 24mm and 28mm use quartz calibres. Cases of 33mm and larger use automatic movements. A 24mm case reads small on a wrist over 17cm. Strap widths do not interchange between sizes.

What copies get wrong

  • Crown cabochon: genuine uses a synthetic blue spinel. Copies use glass or tinted plastic.
  • Dial printing: Roman numerals on genuine dials are applied and glossy. Copies show flat pad printing.
  • Caseback: genuine engraving is deep, with a reference number and a serial number. Copies use shallow laser etching that repeats one serial across units.
  • Case profile: the Ballon Bleu case curves at the flanks and lugs. Copies flatten there.
  • Movement: a 24mm genuine watch is quartz, so a sweeping second hand points to a swapped case.

Legal status in the US

18 U.S.C. section 2320 makes trafficking in counterfeit goods a federal crime. A first offense carries up to 10 years in prison. A second offense carries up to 20 years. The Lanham Act, 15 U.S.C. section 1114, lets a trademark owner sue for damages and recover the seller's profits. U.S. Customs and Border Protection seizes counterfeit watches at ports of entry. Payment processors and online marketplaces close accounts tied to counterfeit sales.

Checks on a 24mm case

  1. Match the caseback reference number against Cartier records.
  2. Ask for Cartier service papers or a boutique receipt.
  3. Inspect the cabochon under light. Spinel shows a deep blue with no bubbles inside.
  4. Weigh the watch. A 24mm steel case on a leather strap is light, but copies shed more grams and feel hollow.

Cartier does not publish a full reference list for the 24mm line. Reference numbers differ by metal, bracelet, and dial. Confirm any specific number with Cartier before you rely on it.