I found these two apparently Zuni pins at an antique store so I am hoping to find some clues as to who the artists were who made them. The Knifewing is 2 3/8in across and has kkm or kkw scratched lightly on the back (not electropencil), and the Rainbowman is 2 3/4in high with no marks. I have no idea how old they are or anything. Any ideas? Am I right to assume they are Zuni?