Cartier unveiled the Clé at SIHH 2015. This model comes in various sizes and has a graceful shape that falls somewhere between round and cushion. Its design may seem reminiscent of watches from the 60s and 70s, but Cartier's signature modern touches and impeccable finish set it apart. The watch is cleverly named after its unique crown locking mechanism, known as the 'key'. The W2CL0002 version features a silver dial and stainless steel case with a pink gold 'key', complemented by a three-link stainless steel and pink gold bracelet."