Short answer
A fake Clé de Cartier steel watch copies a Cartier model that arrived in 2015. The name refers to the crown, which is shaped like an old key. Cartier built steel Clé cases in 35 mm, 40 mm, and 41 mm. The 40 mm automatic is the version copied most. Copies fail in four places: dial print, crown action, caseback engraving, and movement finish. Case dimensions are easy to copy. Steel finishing, print quality, and the movement are not.
Genuine steel Clé de Cartier specs
These figures come from Cartier spec sheets for the steel automatic.
- Movement: Cartier calibre 1847 MC, automatic
- Frequency: 28,800 vibrations per hour (4 Hz)
- Power reserve: 42 hours
- Jewels: 23
- Crystal: sapphire, front and caseback
- Crown: key-shaped, set with a blue synthetic spinel
- Dial: silvered opaline, Roman numerals, blued-steel sword hands, date at 3 o'clock
- Water resistance: 30 m
- Bracelet: steel with folding clasp, or alligator strap on some references
Cartier does not publish case weight, so gram counts from sellers come from a kitchen scale, not from the brand.
Dial
Genuine dial print is thin and sharp. Roman numerals have flat tops and even stroke width. Copies show thicker print, uneven numerals, and ink that spreads at the edges. The date font is a match point. Cartier uses a flat, narrow font. Copies use a wider font with heavy digits. Cartier puts a hidden CARTIER inside the VII numeral on some dials. Compare the VII strokes with a photo of a known watch before you pay.
Crown
The key-shaped crown is the signature part. On a real watch the crown turns with a smooth, even drag and no side play. Copies feel gritty and wobble. The spinel cabochon on a real steel Clé is a deep, even blue with no bubbles. Copies use glass or dyed resin, which shows bubbles under a loupe or a flat, dull color.
Caseback and movement
Steel Clé automatics use a sapphire caseback. The 1847 MC movement shows Geneva stripes, blued screws, and an engraved Cartier name on the rotor. Copies use a stock automatic movement with a plain rotor and no decoration. Some fakes fit a solid steel plate or mineral glass to hide the movement.
Engraving and serials
Cartier engraves the reference and serial on the caseback with a fine, shallow cut. Copies show deeper cuts, burred edges, and repeated serial numbers across units. A seller who shows the same serial on two listings is a warning sign.
Bracelet and clasp
Steel links alternate brushed and polished surfaces. On a real bracelet the transitions are crisp and the edges are rounded. Copies leave sharp edges, uneven brushing, and gaps between links. Clasp engraving on a real watch is shallow and clean. Copies show blurry or ragged engraving.
What to ask before you buy
- Reference number. Steel Clé references use the WSCL prefix.
- Caseback photos at an angle, in daylight.
- A close photo of the dial print and the date window.
- Box, papers, and the purchase date.
- Service history if the watch is older than five years.
Resale prices for steel Clé models run below original retail. A price far under the market range points to a copy, a stolen watch, or a watch with damage.