Short answer
410207 is not a Cartier reference number. Cartier watch references start with the letter W, such as WSCL0007 or W2CL0004. A six digit code like 410207 comes from a seller catalog, not from Cartier. Treat it as a stock keeping unit for a replica Clé de Cartier.
What the Clé de Cartier is
Cartier released the Clé de Cartier line in 2015. The name comes from the crown. Cartier shaped the crown like a key, and "clé" is French for key. Three-hand models came in 31 mm, 35 mm, and 40 mm cases. Steel, rose gold, and yellow gold versions exist. Automatic models run the in-house 1847 MC caliber with a power reserve near 42 hours. Sapphire crystal sits on the front and the case back. The dial carries Roman numerals and a rail track minute ring.
What 410207 listings contain
Listings that use the 410207 code describe a 35 mm or 40 mm three-hand watch with a steel case and a steel bracelet. Claims in these listings cover:
- Stainless steel case at 35 mm or 40 mm, 9 mm to 11 mm thick
- Automatic movement, often a Miyota 9015 or a Seagull ST2130
- Quartz movement on the lowest tiers
- Mineral glass on low tiers, sapphire on higher tiers
- Solid link bracelet with a butterfly clasp
Ask the seller for the movement name, the case thickness, and the crystal type. The key crown is the hard part. Replica crowns have a shallow groove and a loose fit against the case.
Prices
Replica Clé de Cartier prices run from about $80 to $400. Steel models from Cartier on the secondary market run from about $4,000 to $7,000. Case weight, dial printing, and bracelet end link fit separate the replica tiers. Photos of the crown from the side show the difference fastest.
Legal status in the US
Counterfeit watches are illegal to import and to sell in the United States. 19 U.S.C. 1526 lets customs seize and destroy them. A seized shipment is a total loss for the buyer. Cartier reference numbers for the genuine line are listed on the brand site, and no genuine Clé de Cartier uses a 410207 code.