Cartier Santos Dumont Chronograph Extra-Large Silver Stainless Steel Watch WSSA0017. Chronograph mechanical movement with automatic winding, caliber 1904 CH MC. 43.3 mm stainless steel case, sapphire crystal. First strap in rubber, second strap in black “Gomma” alligator leather, with steel folding buckle. Both bracelets are fitted with the “QuickSwitch” interchangeability system. Water-resistant up to 10 bar (approx. 100 meters).