This vintage Native American silver thunderbird pin measures approximately 1-1/2 (3.8 cm) in diameter. Has a secure closing roll over style pin back. Like most Native American pieces of jewelry of this vintage, this is not hallmarked or marked for silver content. It is sterling, or a slightly lower grade of silver.The item "VINTAGE HOPI INDIAN NATIVE AMERICAN ROUND SILVER THUNDERBIRD PIN BROOCH" is in sale since Saturday, December 3, 2016. 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.