Quick answer
"Replica Cartier Rotonde 4200" is a seller term. Cartier does not use 4200 in its reference numbering, and no official Rotonde model carries that number. In replica listings, 4200 refers to the 42 mm Rotonde case diameter or to a factory batch code. Cartier reference numbers follow formats such as W1556251 or CRW1556251. A replica that carries a Cartier trademark is a counterfeit good under US law. It is not a legal product category.
What the genuine Rotonde de Cartier is
The Rotonde de Cartier is a round-case line in the Cartier catalog. Case diameters run from about 40 mm to 42 mm. Movements differ by model: automatic, hand-wound, and tourbillon versions exist. Case materials include steel, pink gold, white gold, and platinum. Retail prices run from about $7,000 for steel models to more than $100,000 for high-complication versions. Prices shift by year and market.
Why 4200 is not a Cartier reference
Cartier reference numbers carry a W or CR prefix plus six digits. A four-digit number such as 4200 does not appear in the published catalog. Some sellers attach 4200 to a caliber name. Cartier lists calibers named 1904 MC and 430 MC. Any claim of a Cartier 4200 caliber has no source at Cartier.
What buyers receive at each tier
- Case: plated steel, measured between 41.5 mm and 42.5 mm.
- Movement: Chinese automatic (Seagull, Hangzhou) or Japanese Miyota. Swiss ETA claims are uncommon in low tiers.
- Glass: mineral crystal at low tiers, sapphire at higher tiers.
- Water resistance: 30 m to 50 m on paper. Pressure tests are uncommon.
- Finish: laser engraving on the caseback, shallower than factory stamping.
Legal status in the United States
Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320. Penalties reach 10 years in prison for a first offense and 20 years for repeat offenses. CBP officers may seize counterfeit watches at the border. A rights holder can sue for statutory damages under 15 U.S.C. 1117: $1,000 to $200,000 per counterfeit mark, and up to $2,000,000 if the infringement is willful. A single watch for personal use does not create an exemption.
Checks for an authentic Rotonde
- Caseback: reference number, serial number, and maker marks.
- Dial: "Swiss Made" at 6 o'clock, printed in one line.
- Movement: Cartier-signed rotor and bridges.
- Papers: warranty card and boutique service history.
- Weight: solid gold cases weigh more than plated steel.
Cartier does not publish a public serial database. A boutique or an authorized service center can confirm a reference number.