How to spot a fake Cartier Privé Tank Chinoise
Start with the case architecture, then work inward to the dial printing, the hallmarks, and the movement. A genuine Privé Tank Chinoise is an 18k gold case whose brancards form two continuous horizontal bars that pass over the dial, top and bottom, echoing a Chinese portico. It carries an Au750 stamp plus a Swiss precious-metal punch on the caseback, a fluted crown set with a cabochon, and a Cartier manual-winding calibre visible through the sapphire back on the skeleton versions. Copies fail on at least one of those points, and often on three or four. The full check takes about ten minutes with a loupe and a scale.
What you need before you start
- A 10x jeweler's loupe, or a phone macro lens
- Digital calipers and a scale that reads to 0.01 g
- A small magnet
- Reference photos of the exact variant you are inspecting
- The original certificate, box, and any service paperwork
Step-by-step authentication
- Measure the case with calipers. Record length, width, and thickness, then compare against the published figures for that variant. Copies tend to run one to two millimetres long or noticeably thick because the case is built around a generic movement.
- Study the brancards. On the real watch the two horizontal bars are cut from the same block as the case, with crisp polished edges meeting brushed flanks. Traces of plating, rounded inner corners, or a visible seam where a bar meets the case point to a fake.
- Read the dial under the loupe. Check the Cartier signature for correct letterforms and spacing, the Roman numerals for clean serifs, and the Swiss Made stamp at six o'clock. On many Cartier dials the secret signature is worked into the VII numeral, so look for the letters inside the stroke.
- Inspect the crown and cabochon. The crown should be fluted and cut in gold on a gold case, with the cabochon set flush and centered. Glue residue, a plastic bead, or an off-center stone is a common tell.
- Turn the watch over and read the engravings. You want Cartier, the reference number beginning with CR, the case serial, and Au750 or 750 alongside a Swiss hallmark. Engraving should be deep and even. Lasered, shallow, or smudged text is a red flag.
- Examine the movement through the display back. Time-only models use a Cartier manual calibre; skeleton models use an openworked Cartier calibre. Look for Geneva stripes, circular graining, blued screws, and clean bevels. Generic clones show rough edges, mismatched screw slots, and a jewel count that does not match the spec sheet.
- Weigh the watch and hold a magnet near the caseback. Solid gold is not magnetic. If the magnet grabs, the case is steel with gold plating.
- Verify the paperwork. Match serial numbers on the case, the certificate, and the box label. A boutique or authorized service center can confirm the reference and production details if you supply the numbers.
- Have a watchmaker put it on a timing machine. Amplitude, rate, and beat error should sit inside the range the calibre is rated for. Erratic readings on a freshly serviced-looking watch usually mean a swapped movement.
Fast red flags
- A price far below the current market for the variant
- A seller who will not allow the caseback to be opened
- Misspelled or badly spaced text on the dial
- Missing hallmarks, or a steel stamp on a gold model
- Caseback screws with chewed or mismatched slots
- Weight well under what a solid gold case of that size should feel like
If the watch turns out to be fake
Stop the transaction, keep the listing screenshots, and report the sale to the platform and to your national consumer protection office. Selling a counterfeit as a genuine Cartier is trademark infringement and fraud in the United States and most other markets. If you already paid, dispute the charge with your card issuer or payment provider and file a report with the relevant customs authority if the watch was imported.