Vintage Sand Cast Belt Buckle with Turquoise (Navajo).

Although the provenance of this piece is lost to history, and it has no markings (typical of sandcastings), there are some hints... A sticker on the back reads "1963 Arts and Crafts Show Winner".  And in ink "AUDD 36.00"  Very mysterious - we'd love to learn more in you have any thoughts!

3 3/4" wide X 2 5/8" tall. Meant for a 1 3/4" belt.