Short answer: A fake Cartier Tank Cintrée gives itself away in three places first: the case curvature, the dimensions, and the dial print. The real Cintrée has a case that bends to follow the wrist, measures roughly 46 mm long by 23 mm wide, and sits about 7 mm thick, with Roman numerals printed in a single sharp pass. Fakes either use a flat case that rides above the wrist or copy the curve while missing the proportions. Top-tier 1:1 replicas get the curve and the dial right, so the remaining tells move to the crown cabochon, the caseback engraving, and the movement inside.
What you need before you start
- A 10x jeweler's loupe
- Digital calipers that read to 0.1 mm
- A flat table and a bright lamp you can angle
- Reference photos of a genuine Cintrée large model
- A kitchen scale that reads to 0.1 g
How to inspect a Cartier Tank Cintrée
- Measure the case with calipers: length from lug tip to lug tip, width at the widest point, and thickness through the caseback, then write the numbers down before you judge anything.
- Set the watch face down on a flat table and press down on one end, because a genuine curved caseback touches the surface only at its center and rocks.
- Hold the loupe over the dial and read the Roman numerals, checking for jagged edges, filled-in strokes, and uneven thick-to-thin line weight.
- Find the signature inside the VII numeral and confirm the letters stay sharp at 10x instead of looking fuzzy, doubled, or too small.
- Check the hands under the loupe: they should be blued steel, sword shaped, and long enough to reach the minute track without touching it.
- Examine the crown: fluted edges, a faceted blue cabochon, and a stone set flush rather than sitting proud of the metal.
- Turn the watch over and read the caseback, since genuine engraving has clean deep edges while laser-etched copies look shallow with a bright halo around each letter.
- Weigh the watch and compare it to the published figure for that reference, because a gold-plated shell over a steel core runs light and feels hollow in the hand.
- Ask for a movement photo or open the caseback, then look for jeweled bridges and engraved plates instead of a bare quartz module.
What separates a 1:1 replica from a cheap fake
- Case curve: the best replicas press the case into a true wrist-following arc, while budget copies bend only the lugs and leave the midcase flat.
- Dial printing: high-grade replicas use pad printing that holds thin strokes at magnification, while cheap dials bleed and thicken the numerals.
- Crown: the cabochon is the fastest tell, because a plastic or glued stone looks cloudy next to a faceted one.
- Movement: a decorated manual-wind caliber with the correct beat rate sits far above a stock quartz module in resale and in feel.
- Caseback: reference numbers, serial format, and engraving depth are where most 1:1 pieces still fall short of the original.
Reading the results
If the watch fails the curve test and the caliper check, it is a low-tier fake regardless of how good the photos looked. If it passes both and the dial holds up at 10x, you are looking at a 1:1 replica, and your decision comes down to the crown, the engraving, and the movement. Weigh the price against those three details, because they are the parts that cost money to build and the parts you will notice every time you wear it.