It is sterling or a slightly lower grade of silver. I love an original patina so have left it for you to polish as you please. The cuff has some give so it can be adjusted for various size wrists.
The item "VINTAGE 1940'S NAVAJO INDIAN SILVER GORGEOUS SCENIC PETRIFIED WOOD CUFF BRACELET" is in sale since Saturday, November 17, 2018. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Vintage Ethnic/Regional/Tribal\Native American (pre-1935)". The seller is "deja--voodoo" and is located in Santa Cruz, California. This item can be shipped worldwide.