Cartier delivers elegance to the typical skeletonized dial timepiece with the Santos de Cartier WHSA0007. The WHSA0007 has a cushion-shaped case made of steel that measures 39.8mm in width and length, is 9.08mm thick, with a faceted sapphire crystal and a set winding crown. It has a transparent skeletonized dial with blue steel hands and Roman numeral hour markers. The WHSA0007 is a manually wound timepiece with a power reserve of approximately 72 hours. The case is paired with two interchangeable straps. The first is a steel link bracelet with a smart link resizing system and a double fold-over clasp. The second is a blue leather strap with a fold-over clasp. It has a water resistance of 100 meters (330 feet).