Two sizes, five references, one rectangle. The Must is the cheapest way into a Tank and the least forgiving one, because a flat case makes every millimeter visible.
The Tank Must is the flat rectangular Cartier, made in 22 mm and 25.5 mm case widths. Both run quartz because the reference does, and that is what keeps the case thin. The 22 mm reads as a dress watch on a 6 to 7 inch wrist; 25.5 mm is the everyday size for most men. Five references are quoted here from $329, shipping included. Every watch is photographed on a caliper before dispatch, because a Must that has been made thicker reads wrong across a room.
The Tank is not judged on its dial. It is judged on the two millimeters of steel you see when the watch is lying on a table: the case band, the bezel line and the height of the crown. The Must keeps a flat profile, so a case that has been made thicker to fit a cheaper movement reads as wrong from across a room, before anyone looks at the printing.
The second tell is the cabochon. On the reference it is a small blue dome, set at a specific height, with a clean edge where it meets the crown. On a weak copy it is either flat, pale, or sitting proud like a bead. That is a two-second check and it is the one most buyers skip.
Everything else, from the weight of the Roman numerals to the hairline minute track and the frosting along the crystal edge, is settled in a photograph at two or three times life size. That is what the QC set on this page is for, and it is taken on the actual watch rather than pulled from a catalog.
We do not have our own frames for this line yet, and we will not fill the space with another seller's photograph. The three frames we shoot on every Must (case in profile, dial at 2x, codes) are listed below.
All CartierIn the order they are noticed, not the order a spec sheet lists them.
The number that decides whether the watch reads as a Tank or as a small brick. We measure it on the watch we ship and send the figure with the photographs.
Color, height and the edge where it meets the crown. Flat, pale or proud are the three ways this goes wrong.
The numerals should print heavy and even, with the serifs intact at the corners. Thin printing is the first thing that looks cheap under magnification.
A single clean step from bezel to case band. A soft or doubled line means the case was polished after assembly.
The reference has a slight frosting where the glass meets the bezel. A fully polished edge flattens the dial under light.
On the bracelet, the first link should meet the case with no daylight. On the leather, the stitching should be tight and even at the lug.
Only figures the supply line states. Anything unconfirmed is left out rather than filled in.
| Reference | Case | Movement | Bracelet | Price |
|---|---|---|---|---|
| WSTA0051 | 22 mm steel | High-grade quartz | Steel bracelet | $329 |
| WSTA0052 | 25.5 mm steel | High-grade quartz | Steel bracelet | $349 |
| WSTA0040 | 25.5 mm steel | High-grade quartz | Steel or leather, per order | $339 |
| WSTA0041 | 25.5 mm steel | High-grade quartz | Steel or leather, per order | $339 |
| WSTA0042 | 25.5 mm steel | High-grade quartz | Steel or leather, per order | $349 |
The reference is a quartz watch, so this is not a case of a quartz movement standing in for something better. It is the movement the watch was designed around.
Checked on 2026-10-19 · reference numbers from dealer listings · prices include shipping · sample figures for layout review
Unlike Santos, the Tank is not a competitive build. That shortens the question to whether this build is right, not which workshop to choose.
| Line | What it covers here | Where it stands | We quote it when |
|---|---|---|---|
| AF / CR | Every Tank reference on this page | The only line we have found listing the Must in both sizes | Always, for this family |
| BV | Santos case and bracelet work | Does not list Tank references | Not quoted here |
| GF | Santos, balanced finish | Does not list Tank references | Not quoted here |
Case on a caliper, then from the side, so thickness and the cabochon height are both in one frame.
Straight on at two times life size. The numerals and the minute track are the parts a loupe would be used for.
Tag, warranty card and case back side by side. Three matching codes or the watch goes back to the line.
22 mm reads as a dress watch on a 6 to 7 inch wrist and almost disappears under a cuff. 25.5 mm is the safer everyday size for most men and for women who want a watch with presence. If you are between them, send a wrist photo next to a coin and we will say which we would take.
The reference itself is quartz, so there is nothing to apologize for. The case was designed around a thin movement, and thickness is the first thing we check.
The bracelet suits daily wear and is the harder of the two to get right, because the end links have to meet the case cleanly. Leather is more forgiving and cheaper to replace. We stock both and swap at no charge before dispatch.
Synthetic sapphire, as on the reference. What we check is color and height, not the certificate.
Yes. The Cartier box and papers are $80 and are photographed with the watch, so you see the box you are getting rather than a library image.
Two to four days to confirm the batch, then seven to twelve days in transit. QC photographs arrive before dispatch, and that is the point where you can still stop the order.