Quick answer
A fake Cartier Santos black is a replica of a Santos de Cartier with a black dial, a black ADLC bezel, or a black coated case and bracelet. Three genuine builds cover most replicas on the market: the Santos Large in steel with a black dial, the Santos Large with a black ADLC bezel and steel center links, and the all black Santos with an ADLC coated case and bracelet. The last one is the hardest to judge from photos because the coating hides case finishing.
Genuine dimensions to compare
Cartier lists the Santos Large at 39.8 mm wide, 47.5 mm from lug to lug, and 9.38 mm thick. The Santos Medium measures 35.1 mm wide, 41.9 mm lug to lug, and 8.83 mm thick. The case is a square with curved sides, so width reads across the case, not the bezel. A caliper on the caseback gives the number that matters. Most replicas come from a 39.8 mm mold. Medium replicas are less common and measure 36 mm or more in many batches.
Movement inside replicas
The genuine Santos Large runs the Cartier 1847 MC, an automatic with 23 jewels, 28,800 vibrations per hour, and a 42-hour power reserve. Sellers list three replica movements: an Asia 2824 clone, a Miyota 9015, and a decorated copy that prints 1847 MC on the rotor. The Asia clone beats at 21,600 vph in many batches, so the seconds hand sweeps at a slower rate. A timegrapher shows rate, amplitude, and beat error in under a minute. Ask for a printout before payment.
Black coating
Genuine black Santos cases use ADLC, a carbon based coating bonded to steel. Cartier does not publish coating thickness. Replica black cases use PVD or DLC in a layer of 2 to 5 microns. Edges wear first. Look at the bezel corners, the crown guards, and the links next to the clasp. A gray or silver line at an edge means the coating has worn through.
Dial and bracelet checks
Roman numerals on the genuine dial are applied steel with polished faces. Replicas print them or use thin stamped plates that sit flat. The crown holds a blue synthetic spinel cabochon. Replica cabochons are glass or plastic and look dull under a light. Genuine bracelets use the QuickSwitch spring bar system and SmartLink removable links. Replica bracelets copy the look and use standard spring bars.
Price ranges
Replica black Santos watches sell for $180 to $600. Price tracks the movement and the coating. Genuine Santos de Cartier steel models list between $7,000 and $8,000 USD. Black ADLC versions sit above that. A price under $150 points to a quartz module or a low grade automatic.
Legal status in the United States
Counterfeit watches are illegal to sell or import in the US. 18 U.S.C. 2320 covers trafficking in counterfeit goods. U.S. Customs and Border Protection seizes shipments of counterfeit watches, and a buyer can lose the item with no refund. Possession for personal use is not the charge. Sale and import are.
What to ask for
- Case width, lug to lug, and thickness with a photo of the caliper
- Movement name and a timegrapher printout
- Macro photos of the bezel corners and the crown cabochon
- End link fit at the lugs
- Serial and reference engraving on the caseback