Authentic Cartier Tank Must Small watch, model WSTA0051. Features a stainless steel rectangle case and bezel with a solid case back. Includes a synthetic cabochon spinel crown on the beaded winding mechanism. The silver dial displays Roman numeral hour markers alongside minute markers around its inner rim, accented by blue hands and scratch-resistant sapphire crystal. Powered by quartz movement and offers basic hour and minute functions. Water resistant to 30 meters (approx. 100 feet).