This is an authentic CARTIER Stainless Steel 18K Yellow Gold 42mm Ballon Bleu De Cartier Automatic Watch. This watch is made of stainless steel and has six 18k gold links on the band and an 18k gold crown with a blue synthetic spinel cabochon. Case dimensions: 42.1 mm diameter, 13 mm thickness. Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.