Quick answer
A fake Cartier Roadster gives itself away at the crown, the dial printing and the case back. Cartier built the Roadster from roughly 2001 to 2012, so any listing that describes a new one from an authorized dealer is wrong on its face. Every genuine example carries a blue synthetic spinel cabochon in the crown, sharp engraving on the case back, and a Swiss movement behind a screwed back. If a seller cannot show you those details in focus, treat the watch as counterfeit.
Before you inspect
- 10x jeweler's loupe
- Digital scale accurate to 0.1 g
- Calipers
- A reference photo of the same Roadster variant from a dealer or auction listing
Step-by-step inspection
- Weigh the watch. A steel Roadster on a bracelet sits in a narrow weight band for its case size. Counterfeits use lighter alloys and often land 20 g or more under the real figure. Compare against a verified example of the same reference, not against a number you read in a forum thread.
- Measure the case with calipers. The Roadster case is a barrel shape with a flat top edge and a slight curve at the lugs. Compare length, width and lug spacing to the published dimensions for that reference. A case that measures wrong in any direction cannot be genuine.
- Examine the crown. Genuine Roadster crowns are fluted and set with a blue synthetic spinel cabochon. Fakes use glass, plastic or dyed resin. Under a loupe the fake stone shows bubbles or a milky tone, and the fluting is shallow or uneven around the rim.
- Read the dial at 10x. The Cartier signature, the Roman numerals and the country-of-origin stamp at the bottom of the dial should all be sharp with unbroken serifs. Fakes show thick, blobby lettering, dropped accents, and numerals that touch the inner track or the chapter ring.
- Study the date window. The aperture should be cleanly cut with square corners and the date disc should sit flush with the dial. A counterfeiter usually leaves a rough frame, a crooked aperture or a date font that does not match Cartier's typeface.
- Turn the watch over. A genuine case back shows the reference number, serial number, case material and water resistance rating, engraved at even depth with consistent spacing. Fakes use shallow etching, mismatched fonts and reference numbers that do not match the dial layout.
- Work the crown and pushers. The crown should turn with light, even resistance and pull to distinct positions. Pushers on a chronograph should click and reset to zero in one motion. Gritty action, wobble or a pusher that fails to snap back points to a cheap movement.
- Check the bracelet or strap. On a steel Roadster, the end links should meet the case with no gap and the clasp engraving should match the case back. Look at the fasteners: counterfeits often use slotted screws with the wrong head profile or push pins where the real bracelet uses screws.
- Have a watchmaker open the back. Genuine Roadster automatics run a Cartier calibre built on a Swiss ebauche, and the rotor carries engraved Cartier text. Look for a decorated rotor, blued screws and a balance that oscillates in a smooth arc. A bare, unmarked movement settles the question in seconds.
- Match the paperwork. The certificate, the reference number on the warranty card and the serial on the case back must all agree. Counterfeits frequently share one serial across dozens of listings, which is easy to spot with a search.
Details counterfeits get wrong
- Cabochon color that is too bright, too dark or clearly plastic
- Roman numerals with the wrong stroke weight and spacing
- Case back engraving that is shallow or set in the wrong font
- Sapphire crystal with weak anti-reflective coating and distortion at the edges
- Bracelet screws with the wrong head profile
Photographs will not settle it
Listing photos are shot to hide flaws. Angle, lighting and retouching can make a counterfeit dial look correct and a genuine patina look like damage. Ask for a movement shot, a straight-on dial shot and a close shot of the crown, then compare each one to a verified example of the same reference. If the seller refuses any of the three, walk away.
Confirm before money changes hands
Take the watch to a Cartier boutique or an independent watchmaker who services the brand. A hands-on check of the movement and case takes minutes and costs little compared to the price of a mistake. Ask for the original invoice and service history, and pay with a method that gives you a chargeback route. Note that importing counterfeit goods into the United States is illegal and the shipment can be seized, which leaves you with no watch and no refund.