There isn't a brand in watches more associated with watch shapes than link Cartier, a company that has tended to set the general template for what one of its distinctively shaped watches is – a Tank, say, or a Santos, like the one here – and then iterates on it endlessly. The Santos de Cartier is based on one of the earliest timepieces ever created for aviation, and so the implementation of a chronograph into the design kind of makes perfect sense.