How the Cartier Tank Evolved From 1917 to Today

Louis Cartier conceived the Tank in 1917, and sources agree the Renault FT-17 tank, used by the Allies in the First World War, was the inspiration. The case sides, called brancards, run straight past the dial and into the lugs, much like the tracks on the vehicle. A hand-built prototype is said to have gone to General John Pershing, who commanded the American Expeditionary Forces.

Sales came later. Worldtempus reports that six Tanks were added to Cartier's inventory between November 15 and December 26, 1919, and that all of them had sold by January 17, 1920. Some sources date the official release to 1919 and others describe the first pieces as limited production, so treat the exact moment of launch as slightly fuzzy.

Louis Cartier wasn't new to the wristwatch. He'd already designed the Santos in 1904 for the aviation pioneer Alberto Santos-Dumont. The Tank took a different route, though: a clean rectangle rather than a round case with exposed screws.

Cartier started adapting the shape almost at once. The Tank Cintrée arrived in 1921. The name means curved, and the case is longer and bends slightly to follow the wrist. Luxury Bazaar notes that early Cintrées were made in small numbers, which is one reason they sit among the more valuable vintage Tanks.

The Tank Chinoise appeared in 1922 in most accounts (Worldtempus lists 1921), with a dial design said to echo the gates of East Asian temples. Sotheby's notes that Cartier revived it in 2022 as part of the Cartier Privé collection. The Tank Louis Cartier followed in the early 1920s, with subtly rounded edges that softened the original profile. Luxury Bazaar says it has always been made in precious metal.

Later vintage variants kept going. The Basculante dates to 1932 in Worldtempus's list, and the Asymétrique to 1936. Each is a variation on the same idea: a rectangular case with brancards, reshaped for a different taste.

By the 1970s Cartier had a problem with its own success. According to Luxury Bazaar, after Cartier sold its New York branch in the 1960s, many gold plated (vermeil) Tanks reached the market, and people often saw them as cheap and below the brand's standard.

Cartier's answer was to improve those watches and sell them in an organised way. In 1977 it launched Must de Cartier, named for the slogan that Cartier was a must. The Must Tank was the affordable entry to the house. Worldtempus lists a Must Tank in 1970 in its timeline, so the exact date of the first Must pieces varies by source, but 1977 is the year most sources give for the Must line.

Today the Must is an easy way into the brand on the pre-owned market. Just check what you're buying: the Must line has mostly used quartz movements, which service differently from a hand-wound Tank Louis Cartier.

The Tank Américaine debuted in 1989, according to Sotheby's. It was the first Tank with a curved, waterproof case. That sounds like a small point, but it made the Tank a more practical daily watch, and Sotheby's ties it to a shift toward more complex mechanical movements, such as chronographs and moon phases.

The Tank Française followed in 1996. Its case and bracelet merge into one flowing line, with a chain link bracelet that sits flush against the case. Some sources give 1995, so you'll see both years quoted. It's a more modern take on the Tank, and Sotheby's lists Princess Diana among its wearers.

Cartier added the Tank Solo in 2004 as a more accessible entry point. Luxury Bazaar says it resembles the Louis Cartier but with a differently shaped case, and that it's cheaper partly because it is offered in stainless steel and sometimes with a quartz movement.

For most of the Tank's life Cartier bought its movements. Luxury Bazaar reports that before the mid 2000s, Paris used movements from outside makers including Jaeger-LeCoultre, Audemars Piguet and Piaget. New York mainly used movements from the European Watch Co., which Cartier acquired in the early 1920s, and London used several suppliers, including Jaeger-LeCoultre.

That changed when Cartier built a manufacture in Geneva in the mid 2000s and moved movement production in-house. The same source says the Tank MC, introduced in 2013, runs entirely on in-house movements.

For owners, this is practical. A vintage Tank may carry a calibre from another maker, and a watchmaker will want to know which. A modern Tank may use a Cartier calibre, a quartz module or a hand-wound movement depending on the model.

Start with the case. Tank cases are slim and flat, so the sharp lines of the brancards matter to the look. On a vintage Tank, a case that still has crisp edges is generally worth more than one that has been heavily refinished. Ask a watchmaker to look at the edges under magnification before you buy.

Then check the dial and the movement against the reference. A replaced or refinished dial is a common reason for a price gap between two apparently identical watches, and as the section above shows, the movement can differ by workshop and era. Ask for the reference and the calibre, not just the name.

Finally, ask about service history. A hand-wound Tank movement is small and delicate, so servicing it is a job for someone who handles vintage movements regularly. If you're considering a piece from the 1920s or 1930s, have a watchmaker confirm parts availability before you commit.