Cartier
Tank Must Large
WSTA0041 · 33.7×25.5mm
The 1917 Tank silhouette in modern Cartier entry-tier trim.
Two rectangular dress watches, very different propositions
Cartier's 1917 Tank, designed by Louis Cartier, was inspired by the WW1 Renault FT-17. The current entry-tier Tank Must reissues the silhouette in quartz at €2,950: blued sword hands, Roman numerals, leather strap. It is the most-recognisable rectangular dress watch in history.
JLC's 1931 Reverso was designed for British army polo players in India: the case flips so the engraved caseback faces outward and the crystal cannot shatter from a polo mallet. Continuously produced since 1931. Cal. 822/2 manual-wind, hand-finished, €8,400 for the medium.
Spec sheet
| Attribute | Cartier Tank Must Large | Jaeger-LeCoultre Reverso Classic Medium |
|---|---|---|
| Reference | WSTA0041 | Q3858520 |
| Case dimensions | 33.7×25.5mm × 6.6mm thick | 40.1×24.4mm × 8.5mm thick |
| Case material | Stainless steel | Stainless steel |
| Movement | Quartz | Cal. 822/2 (manual-wind) |
| Reserve | Battery (~5-7 years) | 42 hours |
| Reversible | No | Yes (caseback rotates to front) |
| Crystal | Sapphire | Sapphire |
| Water resistance | 30m | 30m |
| Strap | Leather (multiple colours) | Leather |
| Retail price | ~€2,950 | ~€8,400 |
Quartz vs manual-wind
The Tank Must runs quartz: zero daily attention, ±15 seconds/month accuracy, battery service every 5-7 years. The Reverso runs manual-wind Cal. 822/2: 30-second daily winding, 42-hour reserve, mechanical-watch ritual. Different ownership relationships. Cartier offers higher-tier mechanical Tanks (Tank Louis Cartier hand-wind) at €4,000+; the Must is deliberately quartz.
Reversibility: novelty or essential?
The Reverso's flippable case is genuinely useful as engraving real estate. The case-back face is blank steel canvas; many owners get monograms, logos, or family details engraved. Most owners flip it occasionally for the novelty, then leave it dial-up. The Tank does not flip; the case-back is plain.
Wrist: 33×25 vs 40×24
Both wear small. Tank Must Large at 33.7×25.5mm is the smaller of the two; Reverso Medium at 40.1×24.4mm is taller but narrower. Both work on 6" to 7.5" wrists. The Reverso reads more dramatic vertically; the Tank reads wider. Neither is unisex; both are deliberate dress proportions.
Pros and cons
Tank Must Large · Pros
- Quartz: zero daily wind, ~5-year battery
- One-third the Reverso's retail price
- Most-recognisable dress watch silhouette
- Coloured-strap variants (red, blue, green)
Tank Must Large · Cons
- Quartz at this price tier disappoints mechanical buyers
- No mechanical caliber (move to Tank Louis Cartier ~€4,000)
- Flat case back (no flip novelty)
Reverso Classic Medium · Pros
- Mechanical manual-wind Cal. 822/2
- Reversible case for engraving real estate
- Continuous production since 1931 (heritage continuity)
- JLC hand-finishing standard
Reverso Classic Medium · Cons
- €8,400 retail vs €2,950 Tank Must
- Manual-wind requires daily attention
- Less brand-recognition than Cartier in non-watch circles
Verdict: which one?
If you want the most-recognisable dress watch silhouette at the entry tier: Tank Must Large. Cartier shape, Cartier brand, €2,950, no mechanical fuss.
If you want a mechanical heritage dress watch with a unique-novelty case: Reverso Classic Medium. Manual-wind, hand-finished, the watch with the engraving canvas.
For a quartz buyer or first dress watch: Tank Must. For a mechanical-watch buyer or someone who wants the Reverso's 95-year heritage: Reverso. Both are correct answers to different questions.
Common questions
Tank Must or Reverso Classic: which should I buy?
If you want the most-recognisable rectangular dress watch silhouette at the entry tier and do not mind quartz, the Cartier Tank Must Large at around €2,950. If you want a mechanical heritage piece with a unique flippable case, the JLC Reverso Classic Medium at around €8,400. For a quartz buyer or first dress watch: Tank Must. For a mechanical-watch buyer or someone drawn to the Reverso continuous heritage since 1931: Reverso.
Is the Cartier Tank Must quartz?
Yes - the entry-tier Tank Must runs a quartz movement (battery service every 5 to 7 years, no daily attention). Cartier deliberately keeps the Must quartz; if you want a mechanical Tank, the hand-wound Tank Louis Cartier starts around €4,000. The JLC Reverso Classic Medium is mechanical: the hand-wound Cal. 822/2 with a 42-hour reserve.
What is the point of the Reverso flipping case?
It was designed in 1931 so British army polo players in India could turn the watch over and protect the crystal from a mallet strike. Today the main practical use is the blank steel caseback as an engraving canvas - monograms, logos, family details. Most owners flip it occasionally for the novelty, then leave it dial-up. The Tank Must does not flip; its caseback is plain.
How big do the Tank Must and Reverso Classic wear?
Both are deliberate dress proportions and wear small. The Tank Must Large is 33.7 x 25.5mm and 6.6mm thick - the smaller and flatter of the two. The Reverso Classic Medium is 40.1 x 24.4mm and 8.5mm thick - taller but narrower, so it reads more dramatic vertically. Both work on roughly 6 to 7.5 inch wrists.
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