A fake Clé de Cartier medium is a counterfeit of the 35.6 mm Clé de Cartier that Cartier introduced in 2015, the model named for its key-shaped crown. Most fakes copy the overall silhouette well, so the tells sit in the crown, the dial printing, the caseback engraving, and the movement.
Why the Clé de Cartier Medium Gets Copied
The Clé de Cartier medium is a simple three-hand watch with a date window, so a counterfeiter does not need to reproduce a chronograph, a perpetual calendar, or a tourbillon. That keeps tooling costs low and volume high. Steel references are the most common targets because case finishing is easier to imitate than solid gold, where hallmarks, weight, and color usually give the watch away.
Start With the Key-Shaped Crown
The crown is the signature of the model and the first place a fake Clé de Cartier medium fails inspection.
- On an authentic watch the crown head is shaped like the bow of a key, with a flat top surface and a straight vertical channel running through it.
- A cabochon sits inside the head. It should be set flush, with no glue visible around the edge and no cloudy appearance.
- The crown should turn with light resistance and seat cleanly in each position, with no wobble.
- Counterfeits often use a smaller head, a rounded profile instead of a flat top, or a stone that looks like colored plastic.
Dial, Hands, and Printing
- Roman numerals should be crisp, with even stroke width and no ink bleed at the edges.
- Cartier's secret signature is worked into one numeral. On fakes it is often missing, oversized, or stamped as a separate mark.
- The sword-shaped hands should be blued steel on most references, with sharp tips and a polished bevel along the top edge.
- The date window should sit level with the 3 o'clock numeral and carry a frame that matches the dial finish.
- Printing is the fastest check under a loupe. Look for text that thickens, thins, or sits crooked against the dial.
Caseback Engravings and Serial Numbers
Authentic casebacks carry the reference number, the individual serial, the model name, and the metal or steel marking, all cut deep with clean edges. On a fake Clé de Cartier medium the engraving is often shallow, laser etched rather than cut, or spaced unevenly across the back. Take a clear photo of the caseback and compare it against the official record for that reference. A seller who blurs or hides the serial in listing photos is hiding something.
Movement and Winding Feel
The medium automatic runs on Cartier's in-house caliber 1847 MC. Under a loupe, the rotor engraving, the finish, and the jewel count should match what Cartier lists for that reference. A ticking seconds hand where the reference should show a mechanical sweep is an immediate fail. On cheap automatics the rotor wobbles against the movement and winding feels gritty through the crown.
Box, Papers, and Price Signals
- The warranty card, booklet, and box should match the reference and the date on the card.
- Service history can be confirmed with Cartier or an authorized service center.
- A price far under the current secondary market for a complete set is the most reliable warning sign there is.
- Counterfeits carry no Cartier warranty and cannot be serviced by Cartier. Selling them is illegal in many jurisdictions.
How to Verify Before You Buy
- Ask for sharp photos of the crown from three angles.
- Request the caseback serial and reference number in writing.
- Compare the dial printing against official product photos at high magnification.
- Have the watch inspected by a watchmaker or a Cartier service center before payment.
- Buy only from a seller who accepts a return after authentication.