Answer first
410200 is not a Cartier reference number. Cartier reference codes for the Clé de Cartier line start with a letter block, such as WSCL, WGCL, or WJCL, then four digits. A bare six-digit number like 410200 comes from a reseller catalog, an auction lot, or a marketplace listing. It does not point to a Cartier model, a case size, or a production year.
What the Clé de Cartier is
Cartier released the Clé de Cartier in 2015. The name refers to the crown, which is cut to look like the head of a key. "Clé" is French for key. The case is round with a slight cushion shape. Case sizes run 31 mm, 35 mm, and 40 mm. Metals include stainless steel, 18k pink gold, yellow gold, and white gold. Diamond-set bezels appear on several references.
The 40 mm versions use the Cartier 1847 MC automatic movement. Specs: 23 jewels, 28,800 vibrations per hour, about 42 hours of power reserve. Smaller sizes used quartz or automatic movements, based on the reference. Case back type differs by version. Some are solid, some have a sapphire window. Confirm the exact reference before you judge a case back.
Where 410200 shows up
Replica sellers and marketplace feeds add numeric codes to separate colorways, sizes, and batches. The same number can point to a steel 40 mm watch on one page and a gold 35 mm watch on another. A code of this type tells you nothing about the movement, the case metal, or the factory. Treat it as an internal SKU.
How to check a Clé de Cartier
- Crown: key-shaped head with a blue sapphire or spinel cabochon. It turns with the stem. It sits in a recessed slot in the case flank.
- Dial: Roman numerals, a rail-track minute ring, and a hidden Cartier signature drawn inside a numeral, the VII on most Clé references.
- Case back: reference number, case number, and metal hallmarks. Engraving on genuine cases is shallow and crisp. Stamped or acid-etched marks show a soft edge.
- Weight and feel: a steel Clé watch has a dense case and a tight bezel fit. Replicas in plated brass or low-grade steel feel light for the size.
- Movement: fakes carry a Miyota 9015, a Chinese ETA 2824 clone, or a quartz module. Rotor print and bridge finishing differ from the 1847 MC.
Price range
Steel Clé de Cartier watches listed at retail for about $6,000 to $9,000. Gold models ran from about $15,000 to more than $40,000. Replica listings run from about $80 to $500. The gap covers case metal, movement, and finish work.
US law
18 U.S.C. § 2320 makes trafficking in counterfeit goods a federal crime. 19 U.S.C. § 1526 lets US Customs and Border Protection seize counterfeit imports. One purchase for personal use is not trafficking, but the shipment can still be seized and destroyed.
What to verify before buying
- Ask for the full Cartier reference, not the numeric code.
- Ask for a photo of the case back with the engraving in focus.
- Ask for the movement number and a photo of the movement.
- Check the crown cabochon color and the recess fit.
- Compare the price against the retail range for that metal.