A "yellow V5" Cartier Tank Must is a replica with a yellow-gold finish sold as the fifth generation of one factory's build. The V5 tag is a seller's version number, not a Cartier designation. In practice it usually signals a reworked case profile, revised dial printing and a different crown cabochon compared with earlier batches. No industry body standardizes these numbers, and two sellers can attach V5 to different watches. Treat the label as a claim to check, not a quality grade.
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Prerequisites
- Genuine reference specs for the Tank Must size you are comparing (Large is roughly 33.7 by 25.5 mm).
- A 10x loupe or a phone macro lens.
- Your wrist measurement and the strap length you need.
- Dated photos or a video from the seller, not stock images.
Inspection Procedure
- Ask the seller to state the factory name and batch date in writing.
- Measure the case across the brancards and compare it to the genuine figure for that size.
- Check the four brancards for straightness along their full length.
- Run a fingernail along each case edge to feel for burrs or a rounded-over profile.
- Examine the dial printing with the loupe at the 12 and 6 positions.
- Compare the Roman numeral thickness on all four sides of the dial.
- Inspect the crown cabochon for facet count and color under daylight.
- Turn the crown through a full time-setting cycle and listen for grit.
- Check the caseback screws for flush seating and clean slots.
- Weigh the watch head and compare it to the expected figure for the size.
- Match the buckle finish to the case finish in the same light.
- Ask for a short video of the seconds hand sweep before paying.
Case and Finish
The Tank Must is a flat, rectangular watch, so flaws show at the edges. Later batches tend to fix the earlier oversized crown and the too-thick bezel lip. Look at how the polished sides meet the brushed surfaces. Sharp transitions and consistent brushing on both brancards are the signs of a newer tooling set. Yellow-gold plating is the weakest point on any replica. It drifts orange in warm light and brass in shade. Compare the case, crown and buckle side by side in the same photo.
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Dial, Printing and Hands
Dial faults are the most common reason a batch gets replaced. On a V5 claim, check that the "Cartier" script sits level above the VI, that the minute track is continuous, and that the sword hands reach the track without overhang. Many Tanks carry a hidden signature worked into the VII numeral; if the batch claims one, it should be legible under magnification and not a printed smudge. Blued-steel hands should read dark blue, not purple or flat black.
Crown and Cabochon
The genuine crown uses a faceted blue spinel set into a fluted gold crown. Replicas often use glass or dyed synthetic. Under a loupe the cabochon should show even facets and a deep blue that does not wash out in sunlight. A pale or cloudy stone is the clearest sign of an older build, whatever the listing says.
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Movement, Caseback and Strap
The Tank Must is a quartz watch, so a mechanical movement offered under a V5 label is a mismatch worth questioning. Caseback engraving should be crisp and correctly spelled, with screws that sit flush. Strap quality separates the better batches: look for even stitching, a soft lining and a buckle that matches the case tone. Length matters more than most buyers expect, so confirm the strap reaches your wrist size before ordering.
Import and Legal Note
Counterfeit trademarked goods can be detained and forfeited at the U.S. border, and buying one carries risk that a genuine watch does not. Budget for that possibility and keep the seller's written description of the item.