Need help identifying this belt buckle

I have a silver horse head belt buckle that I won at a horse show in the 70’s. On the back are the stamped initials JY


I am trying to find the artist on this belt buckle. I figure it is Navajo but cannot find artists name. Simply stamped JA.

google image search results for Jack Adaki linked below. anything look like your buckle?

Nothing that I saw looked like his work but some of his work is so nice. It looked like he signed his full name. Mine just has initials.

What city and state did you win this in? That might help narrow down an artist.