Buying Turquoise Feather Earrings Sterling Silver Vintage

buying Very nice vintage turquoise and sterling silver feather earrings in Navajo style. As they are unmarked I cannot be certain if they are American Indian made, or not. Many Native American made silver items were not marked in the 1960's and 70's. They do test as sterling silver and the turquoise is genuine. The total length of the earrings is 2". Width 1-1/8".