The WSTA0092 is the large Tank Must SolarBeat as it sits in Cartier's boutiques today: a steel case of 33.7 x 25.5 mm and only 6.6 mm thick, a silvered dial with Roman numerals under blued sword-shaped hands, the blue spinel cabochon in the beaded crown – and a photovoltaic movement that feeds on daylight through the dial itself, designed to run for up to 16 years without a battery change. This reference is the bracelet version, delivered on steel with a folding buckle. Which is exactly why so many owners go looking for leather: the Tank spent a century on straps before it ever wore links, and one swap brings that character back. Here's the correct strap size for the WSTA0092 and the picks that suit it best.
Which Strap Size Fits the WSTA0092?
The Tank Must SolarBeat WSTA0092 takes a 19mm strap. On our product pages, simply select the 19mm option – that is the correct fit for the large 33.7 x 25.5 mm case.
If you're sorting out the family: the small SolarBeat models measure 22 mm across and take 16mm, while the XL automatic Tank Must takes 23mm. The large case covered here – 25.5 mm across – is the 19mm one, and the same width applies whether yours came on the bracelet or on a strap, since the case is identical across configurations.
Swapping is straightforward. The lugs accept a classic two-piece strap on standard spring bars, and every Helvetus strap comes with its own buckle included, so the bracelet can go straight into the box, complete and untouched.
A Quick Look at the WSTA0092
The Tank's face has been settled since 1917 – brancards, Roman numerals, a sapphire-blue point of light at the crown. What the SolarBeat generation changed is everything behind that face: fine perforations in the dial let light through to photovoltaic cells, and the watch simply keeps running – no winding ritual, no battery appointments, just years of quiet accuracy. In the large size, it's the version with real wrist presence, and the one that works equally well on any wrist in the household.
The bracelet it ships on is excellent – secure, cool, contemporary. But polished steel links are also where a daily watch shows its first signs of life, and there's something almost contradictory about a watch engineered to run untouched for 16 years developing visible wear in its first one. A leather strap solves both sides of that equation: the watch gains the classic face the Tank was drawn with, and the bracelet is preserved in flawless condition for the days that call for steel.
That's the quiet luxury of this reference. The movement asks nothing of you. The strap is the only decision the watch leaves in your hands – so it's worth making it a good one.
The Best Straps for the Cartier Tank Must SolarBeat WSTA0092
The large silvered dial, blued hands, and clean steel case give a strap plenty to work with. These are the combinations that suit the WSTA0092 best.
1. Black Crocodile – The Dress Tank
The black crocodile leather strap for the Cartier Tank is what this case was drawn for. Structured black scales under a silver rectangular dial is the most formal look a Tank can wear – boardroom-sharp by day, black-tie ready by night, and a striking transformation from the all-steel bracelet look. If the WSTA0092 is your dress watch, this is its uniform, and one of the most popular choices among Tank owners.
2. Blue Leather – The Built-In Accent
Blued sword hands, a blue spinel in the crown – Cartier gave this watch its accent color at the factory, and the blue leather strap simply extends it to the wrist. Deep blue against the silvered dial reads refined and modern without ever being loud. The easiest way to make the large SolarBeat feel intentional rather than standard.
3. Brown Leather – A Century of Tanks
The brown leather strap is how Tanks have been worn since the very beginning – warm leather under cool steel, heritage in its most comfortable form. On the large case it adds character and softness in equal measure, turning the newest Tank technology into the oldest Tank look. The everyday pick that never needs explaining.
4. Red Leather – The Must Spirit
The Must line made its name in the 1970s with colored straps, and the red leather strap carries that spirit onto the modern SolarBeat. Cartier's own red against silver and steel is confident, joyful, and instantly recognizable – the pick for owners who want their solar Tank to stand apart.
Want more choices? The full strap collection for the Cartier Tank includes further colors, grained finishes, and crocodile textures – all available in the 19mm fit for this reference.
Final Thoughts
A watch that runs for years on light deserves to look its best the whole way through. Put the bracelet safely aside, give the WSTA0092 the leather the Tank was born wearing, and let the dial do the only maintenance this watch will ever ask for – catching the light.
Helvetus is one of the leading names in aftermarket straps for luxury watches, and our Tank straps are cut for these slim rectangular cases rather than adapted to them. Every order ships free worldwide with no import costs, returns are easy, and more than 50,000 watch owners around the world trust our straps on their timepieces. The sun keeps it running – the strap makes it yours.
