Cartier Santos de Cartier Large Grey Stainless Steel Watch WSSA0037. 39.8 mm stainless steel case, sapphire crystal. Manufacture mechanical movement with automatic winding, caliber 1847 MC. Stainless steel bracelet with “SmartLink” adjustment system. Second strap in black rubber, with interchangeable steel deployant buckle. Both bracelets are fitted with the “QuickSwitch” interchangeability system. Water-resistant up to 10 bar (approx. 100 meters).