Cartier Must 21 SS/18K YG 1340. 28 mm stainless steel case. Stainless steel bezel with yellow gold Roman numeral markers. Silver dial with blue hands and black markers. Blue sapphire cabochon crown. Stainless steel and 18k yellow gold band with butterfly clasp. Will fit up to a 5.5 inch wrist. Quartz movement. Sapphire crystal glass.