Cartier Ballon Bleu Chronograph Watch. Extra Large size, measures, 46.8mm x 47.1mm 18K. Has a pink gold case, and features a transparent back, silvered guilloché and lacquered dial with sun-like finish. Watch has automatic winding calibre 8101 MC movement with chronograph function, 18K pink gold bracelet. Water resistant to 30 meters. Reference number: W6920010.