Over the years I've found several pieces of old pawn. I love the expression of the bear in this pin. I assume Navajo. I'm hoping someone might make sense of the symbol right before the sterling mark:
http://i929.photobucket.com/albums/ad132/4more/Jewelry/P4080057.jpg
http://i929.photobucket.com/albums/ad132/4more/Jewelry/P4080058.jpg