Quick answer
Cartier two-tone watches pair a stainless steel case and bracelet with solid 18k yellow gold or rose gold parts. The gold sits on the bezel, crown, and center links. Cartier labels the finish "acier et or." Replica versions of these watches are sold online. In the United States they are counterfeit goods. Selling, importing, or trafficking them carries criminal penalties under 18 U.S.C. § 2320, and U.S. Customs and Border Protection can seize shipments at the border.
What two-tone means in the Cartier catalog
Cartier stamps its gold parts with 750. That number means 18 karat, or 75 percent gold. Steel parts are 316L stainless steel. The gold is solid, not plated. Common gold placements are the bezel, crown, crown guard, bracelet center links, and the exposed screws on Santos models.
Cartier models sold in two-tone
- Santos de Cartier: steel case, yellow gold bezel, gold screws. Medium and large sizes.
- Tank Française: steel and yellow gold bracelet, gold bezel and crown.
- Panthère de Cartier: steel case, yellow gold bezel and bracelet links.
- Ballon Bleu de Cartier: steel and rose gold versions in several diameters.
- Tank Must and Ronde Must: steel-heavy lines. Two-tone stock changes by model year.
Retail prices change with the gold spot price and Cartier's annual updates. Two-tone costs more than steel and less than solid gold. Check current figures with an authorized retailer.
Why two-tone replicas differ from solid gold
Most replica two-tone watches use gold plating instead of solid 18k gold. Plating thickness is measured in microns, and the layer wears through at the crown, clasp, and bracelet edges. Weight is the second gap. Gold is about twice as dense as steel, so a genuine two-tone bracelet weighs more than a plated copy. Third is the hallmark. Genuine Cartier gold parts carry a 750 stamp and a maker's mark. Replica stamps are shallow or misplaced.
Legal status in the United States
Counterfeit goods are illegal to traffic in the U.S. under 18 U.S.C. § 2320. A first offense carries fines and a prison term of up to 10 years. Repeat offenses carry up to 20 years. Under 19 U.S.C. § 1526, CBP can seize and destroy counterfeit merchandise at import. There is no broad personal-use exception for counterfeit trademarked goods. Cartier and its parent company Richemont record trademarks with CBP and file takedown requests each year.
Checklist on any two-tone Cartier
- Weight: steel and gold pieces feel dense for the size.
- Hallmarks: look for 750 and a maker's mark on gold sections.
- Wear: a scratch on plated gold shows the base metal.
- Numbers: the serial and reference sit between the lugs and must match the paperwork.
- Service record: Cartier and Richemont service centers keep history for genuine watches.
No public data measures the accuracy of any single replica. Claims such as "1:1" or "Swiss made" for replica parts have no independent verification.