This is an excellent vintage Must de Cartier manual wind vermeil tank watch. This watch is solid sterling silver with gold overlay. The dial is blue in color and has the Cartier logo and Must de logo printed at 6 and 12.

The case of this watch measures 20.5mm x 27mm and is in excellent condition. It shows no signs of wear on the gold surface. The watch is powered by a 17 jewel manual wind Cartier movement. 

The watch comes with an excellent condition leather strap. 
The watch will be shipped with a one year warranty.