The brand’s most iconic model, the Cartier Tank, was invented in 1917 by the founder of the brand, Louise Cartier. The Tank’s name and design pay homage to the Renault FT-17, a French tank used during the First World War. The modern-day Tank comes in a variety of models and price-points. There are currently six different collections, all with multiple models available. This collection has been in production longer than most watches.