The Cartier Tank Must is a feminine interpretation of the iconic Tank model. Features: Gold Plated Silver Case, 21 mm Diameter, Women's Wristwatch Size, Automatic Winding (indicates quartz movement in name/title), Movement Type: Quartz, Caliber Not Specified Here, Dial Color/Finish: Gold Plated, Strap/Sleeve Material Not Specified Here, Product Code: 1218851