This is an authentic CARTIER 18K White Gold Tank Francaise Ring Size 63 10.25. This simple ring is an 18 karat white gold band. This ring is from the Tank de Cartier collection and is inspired by the iconic “Tank” watch. This ring echoes the harmony and structure of its namesake in the iconic style of Cartier! Follow this item for alerts. Cartier is a registered trademark of Cartier. FASHIONPHILE is not affiliated with Cartier.