A fake Clé de Cartier medium is a copy of Cartier's 35mm Clé de Cartier, a dress watch with a key-shaped crown and an in-house automatic movement. Replicas come in three bands: quartz lookalikes under $100, mid-tier automatics near $200, and higher-grade clones that copy the 1847 MC movement layout. The tells are the crown shape, dial printing, case thickness, and the rotor engraving.
What is the Clé de Cartier medium?
The Clé de Cartier launched in 2015 and takes its name from the French word for key. The winding crown is shaped like a key head and sits flush with the case, so the profile stays smooth from lug to lug.
Medium refers to the 35mm case. Cartier also made the model in 31mm and 40mm sizes, which matters when you compare listings and prices.
Specs at a glance
- Case: 35mm diameter, about 10mm thick, steel or 18k pink gold
- Movement: Cartier 1847 MC automatic, made in-house, about 42 hours of power reserve
- Dial: silvered sunburst, Roman numerals, blue-steel or gold hands, date at 3 o'clock
- Crystal: sapphire front and back, no cyclops over the date
- Crown: key-shaped, set with a blue cabochon
- Water resistance: 30 meters (3 bar)
Cartier no longer lists the Clé de Cartier in its current catalog, so most genuine pieces now move through pre-owned dealers and auction houses.
How do you spot a fake Clé de Cartier medium?
Start with the crown, then the dial, then the case back. Those three points expose most replicas in under a minute.
The key-shaped crown
On the real watch the crown head is a flat, rounded rectangle with sharp edges and a polished bevel. It turns with a light, even drag and stops at the winding limit without grinding.
Cheap copies cast the crown in one piece. The edges look soft, the finish is dull, and the key head sits proud of the case instead of sinking into its recess.
Dial printing and the secret signature
Genuine dial printing stays sharp under a loupe. Check the numeral at 7 o'clock: Cartier has used a hidden brand signature inside the VII on several models, so compare the strokes against official product photos.
The sunburst finish on a real dial runs in one direction from the center. Copies show patchy brushing or a flat matte surface when light hits them at an angle.
The case back and the movement
A genuine Clé de Cartier medium shows the 1847 MC through a sapphire case back. Engraving is shallow, even, and filled with black lacquer, and the rotor carries the brand name in the correct typeface.
Most fakes hide the movement behind solid steel or show a generic automatic with rough finishing, missing jewels, or wrong text on the rotor. A ticking seconds hand instead of a sweep is the fastest giveaway of all.
Weight, thickness, and the date
A steel Clé de Cartier case feels dense and cold in the hand, and the bracelet links move with tight tolerance. Fakes often run a millimeter or two thicker and feel light for their size.
Look at the date window. On copies the numerals are thin, the window sits low in the dial, and the date disc does not center in the aperture.
What do replica tiers cost?
- Quartz lookalike, $30 to $90: steel shell, printed dial, mineral glass, ticking seconds hand.
- Mid-tier automatic, $120 to $300: generic or Miyota-based movement, sapphire on some units, cleaner dial printing.
- High-grade clone, $400 to $900: closer case profile, engraved rotor, sharper dial detail, still not a Cartier movement.
- Gold-plated versions: the plate wears through at the crown and case edges within months of daily wear.
Price alone does not prove quality. Two sellers can list the same factory output at different prices with different photos.
Real gold and real sapphire: what do copies use?
No replica at these prices uses solid 18k gold. Most are 316L stainless steel with PVD or gold plating measured in microns. An acid test on a hidden spot will show the plating, though testing can damage a watch you plan to keep.
Sapphire crystal appears on mid and high tiers. Scratch a hidden corner with a steel pin: sapphire resists, mineral glass marks.
What should you check before buying a first copy watch?
- Ask for a short video, not just photos. Movement sweep, crown action, and clasp click show up in video alone.
- Request a clear shot of the case back and the movement. Sellers who cannot send one are selling blind.
- Confirm diameter and thickness with calipers in the photo. A 40mm listing labeled medium is a red flag.
- Check the return window and the payment method. Card payments give you a dispute path that wire transfers do not.
- Search the seller name plus "review" and read the last page of any forum thread, not the first.
FAQ
Which size is the medium?
Medium is 35mm. The small is 31mm and the large is 40mm, so confirm the diameter before you compare two prices.
How much does a genuine Clé de Cartier medium cost?
Steel examples trade in the low thousands of dollars on the pre-owned market, and pink gold versions run several times that. Box, papers, and service history move the number.
Is a fake Clé de Cartier medium water resistant?
Replicas rarely carry a tested rating. Gaskets are often missing or dry, so keep any copy away from pools, showers, and salt water.
Is buying a replica legal?
Rules vary by country. In the United States, importing counterfeits violates trademark law and customs can seize the goods. Check your local rules before you order.
Will a watchmaker service a copy?
Some will, many will not. Parts for the 1847 MC are not sold to third parties, so a copy with a generic movement is the easier one to repair.