At SIHH 2015, Cartier unveiled the Clé de Cartier. Its case comes in various sizes and has a smooth shape that falls between round and cushion. Although it may remind you of watches from the late 60s and early 70s, it boasts modern details and finishing that are uniquely Cartier. The watch's name is inspired by its innovative crown locking mechanism, aptly referred to as the "key". One particular model, the WJCL0048, features a pink gold case with a diamond-set bezel and a silver dial. It comes with a stylish alligator strap.