A jeweller before a watchmaker, so the case, the cabochon and the secret signature carry the read.
Founded 1847Paris6 weighted checks
Cartier is a jeweller that makes watches, and its authentication reflects that: the decisive features are on the case and the dial rather than in the movement. The blue cabochon in the crown, the Roman numerals with their particular proportions, and the secret signature hidden inside one of them are the checks that matter.
The secret signature is the maison's own anti-counterfeiting device. On genuine dials the word CARTIER is concealed within one of the Roman numerals — usually the VII or the X depending on the model — printed at a size that requires a loupe. Counterfeits either omit it or render it as an obvious mark rather than a concealed one.
Cartier also makes jewellery that is heavily counterfeited — the Love bracelet above all — and those pieces have their own reads: screw geometry, hallmarking and serial engraving.
Cartier engraves a serial on the caseback or between the lugs, and on jewellery on the inner surface of the piece. Alongside it sits the metal hallmark — the assay mark for the gold or platinum content — and on French-made pieces the maison's own poinçon.
The engraving is done to a jeweller's standard: even depth, sharp edges, consistent character height. Laser-etched serials that look printed, or engraving whose depth varies across the number, are the ordinary failures.
The secret signature is on the dial, not in any register. Look at the Roman numerals under a loupe: on genuine production CARTIER is worked into the strokes of one numeral, legibly but only under magnification. Its absence on a model that should have it is a strong signal; its presence rendered obviously and at the wrong scale is equally telling.
Cartier will authenticate its own pieces through a boutique in many markets, which is unusual and useful — the maison's service centres inspect pieces submitted for repair and will decline work on anything not genuine.
Ordered by how much each one settles. The decisive checks are the ones worth your first five minutes; the supporting ones only matter once those are clean.
CARTIER concealed within the strokes of one Roman numeral, printed at a scale that requires a loupe to read. Genuine work is legible under magnification and invisible without it. A missing signature on a model that carries one, or a signature obvious to the naked eye, are both failures.
A faceted blue stone — sapphire on precious-metal references, spinel or synthetic on steel — set into the crown, seated evenly with no visible adhesive and no gap at the bezel of the setting. It should be a cut stone with facets that catch light, not a moulded blue dome.
Cartier's numerals have exact widths and stroke weights, and the railway minute track around them is evenly divided with sharp marks. Counterfeits get the numerals close and the track wrong, with divisions that drift out of alignment with the numerals over the course of the dial.
Cartier cases are finished to a jeweller's standard: the brushed and polished boundaries are exact, the lug edges are crisp, and the crystal is sapphire, seated flush. A crystal that shows the rainbow reflections of mineral glass, or edges that have been softened by machine polishing, are failures.
Assay marks for the metal, the maison's poinçon on French pieces, and a serial engraved to even depth with sharp edges. On jewellery these sit on an inner surface. Shallow, uneven or laser-printed marks are the counterfeit signature.
Quartz Cartier watches are quartz by design and their ticking is not a fault, which distinguishes them from Rolex. What matters is that the movement matches the reference: a mechanical reference containing a quartz movement, or vice versa, is decisive.
Cartier counterfeits split between watches and jewellery, and the jewellery — the Love bracelet and the Juste un Clou above all — now accounts for more volume than the watches. Those are read on screw geometry, on hallmarking, and on the weight of the gold, which cannot be faked without buying the gold.
On the watches, the secret signature and the cabochon between them settle most cases. The maison's willingness to inspect pieces at a boutique makes Cartier one of the few houses where a formal opinion is realistically obtainable.
Each of these is checked differently. The ones with their own page have enough that is specific to them to be worth reading separately.
A round case with the crown enclosed in a guard, where the guard's fit is the read.
Read within the checks aboveA bracelet watch whose links must articulate without rattle.
Read within the checks aboveAuthenticity and value are separate questions, and answering the first is usually a step towards the second. These are broad ranges for honest, unrestored condition — an orientation, never an appraisal.
| Line | Resale as share of retail | What moves it most |
|---|---|---|
| Love bracelet | 60 – 85% | Gold content sets a floor; screws and box add |
| Santos | 50 – 70% | Generation, strap completeness |
| Tank, modern | 40 – 60% | Reference and metal |
| Tank, vintage precious metal | Highly variable | Reference, originality, era |
| Ballon Bleu, Panthère | 35 – 55% | Size and metal |
Broad international ranges. Precious-metal content puts a hard floor under most Cartier pieces that steel watches do not have.
Lovenhall WatchThe checks tell you how it was made. The instrument tells you what it appears to be, and roughly what its kind fetches.