1904, Louis Cartier granted the wish of the famous Brazilian aviator Alberto Santos Dumont: to be able to tell time while flying. The birth of one of the first ever wristwatches sealed the bonds of friendship between these two pioneers. The rounded angles of the dial, the seamless curve of the horns, and the exposed screws made for an iconic watch that would inspire countless reinterpretations. Santos de Cartier Dual Time watch, large model, mechanical movement, dual time zone. Steel case, 7-sided crown with a synthetic faceted blue spinel, satin-finish anthracite grey sunray-brushed dial, second time zone display with an additional hour hand in a counter and a day/night indicator. Rhodium-finish polished steel sword-shaped hands with luminescent material, sapphire crystal. Steel bracelet with SmartLink adjustment system. Second strap in grey alligator leather, with interchangeable folding steel buckle. Both are fitted with the QuickSwitch interchangeable system. Case width: 40.2 mm, thickness: 10.01 mm. Water-resistant up to 10 bar (approx. 100 metres).