Stamp Decorated Shadowbox Ring in Sterling Silver with Turquoise Size 5

Vintage Navajo stamp decorated shadowbox ring set with light blue turquoise stone. It is a size 5. Face measures 1 1/16" long. Has tarnish and a warm patina. Needs to be cleaned. Dusty inside of the shadowbox. Weight: 6.8 grams. No hallmarks. Acid tested.