This pin is stamped UITA 5, which is a group of dealers whom, before mid-century banded together to assure AUTHENTICITY of jewelry they sold. These dealers staked their reputations on these United Indian Traders Association hallmarks.
I will leave it up to you to figure out which trader . .
COLLECTOR ALERT, for sure. Buy it when you see it, no regrets. Otherwise, Don’t let someone else get this before you decide, kinda scarce, eh?