The Clé de Cartier was launched at SIHH 2015 with a range of case sizes. The design is a mix of round and cushion shape, giving it a unique and modern look. Inspired by watches from the 60s and 70s, it still has a distinctly modern Cartier finish. The name comes from the innovative crown locking system, referred to as the 'key'. The WJCL0013 model has a pink gold case, a diamond-set bezel, and a silver dial. It comes with a sleek alligator strap.