The Clé de Cartier was introduced at SIHH 2015. The case, available in a number of sizes, has a soft profile somewhere in between 'round' and 'cushion'. While at first glance the look is not unlike watches from the late sixties and early seventies, both details and finish are distinctively modern and Cartier. It's name is a reference to the clever locking system of the crown - the 'key'. Ref:WGCL0013