Short answer
A replica Cartier Santos 100 is a watch made to copy the Cartier Santos 100, a model Cartier sold from 2004 to about 2019. The copy carries Cartier marks with no license from Cartier. In the US, selling or importing one breaks federal law: 18 U.S.C. Section 2320. A personal purchase is a civil matter, but US Customs can seize and destroy the watch at the border. Cartier will not service it. It has no resale value.
The watch being copied
Cartier made the first Santos in 1904 for Alberto Santos-Dumont, a Brazilian aviator. The Santos 100 arrived in 2004 for the line's 100th year. The case is square with a rounded bezel and screw heads visible from the front. The dial uses Roman numerals, blue steel hands, and a date window at 3 o'clock. Water resistance is 100 m. The medium case measures about 33 mm wide. The large case measures about 38 mm wide and 10 mm thick. Steel three-hand models use Cartier caliber 049, a movement reported as based on the ETA 2892-A2. Chronograph models use caliber 8630. Cartier dropped the Santos 100 in 2018 and replaced it with the Santos de Cartier, which runs caliber 1847 MC.
What goes into a replica
Case metal is 316L stainless steel. Cartier's own alloy and finish differ. Two-tone copies use gold electroplating about 3 to 5 microns thick, and the plating wears at the crown, the clasp, and the bracelet edges. Cheap copies use mineral glass. Better ones use sapphire, often with anti-reflective coating on one side. The crown cabochon on a genuine watch is a blue spinel. Copies use glass or a synthetic stone, and the shade runs dark or purple. Movements come from China or Japan. Common choices are copies of the ETA 2892 or ETA 2824, the Seagull ST2130, or a Miyota 9015. Some units ship with a quartz movement. A Swiss made line on a replica site does not mean the watch was made in Switzerland.
Marks that separate the two
- Bezel screws: the slots on a genuine watch line up in one direction and the heads sit flush. Copy slots sit at random angles.
- Dial print: the weight and spacing of the Cartier name and the Swiss Made line change between copies.
- Date window: position, frame shape, and magnifier strength differ.
- Bracelet: the Santos uses a screw-bar link system. Copy screws use a different thread pitch, and the heads strip.
- Caseback: engraving depth, reference number font, and serial number format do not match Cartier records.
US law and customs
Federal law sets prison time for counterfeit trafficking. A first offense carries up to 10 years. A second carries up to 20. The Lanham Act allows statutory damages of $1,000 to $200,000 for each counterfeit mark, per type of goods. A court can raise that to $2,000,000 for willful use. US Customs and Border Protection seizes counterfeit shipments and can destroy them under 19 U.S.C. Section 1526(e). Watches and jewelry sit among the top seized product categories in CBP annual intellectual property reports.
Swiss made on a replica site
Swiss law requires at least 60% of a watch's production cost to be incurred in Switzerland before a maker can print Swiss made on it. The watch also needs a Swiss movement, Swiss casing, and final checks in Switzerland. A replica built in Asia and finished with a Chinese movement does not meet that test. The FTC also treats country-of-origin claims as deceptive when they are false.
Limits of a replica
Cartier will not touch a replica for service or parts. Independent watchmakers can handle a standard ETA-type movement, but case, bezel, and bracelet parts come from the same sellers, and stock is not guaranteed. Resale demand for a replica is near zero. Cartier holds the Santos trademark and enforces it.