Description: Santos de Cartier WSSA0018 Pre-owned Santos de Cartier ref WSSA0018 traces its roots back to 1904, when Louis Cartier created a practical timepiece for aviator Alberto Santos-Dumont, one of the earliest men’s wristwatches designed specifically for use on the wrist rather than in a pocket. That pioneering spirit still defines the model today, from the softly rounded square case to the signature exposed screws that have become synonymous with the Santos name.