1970's Native American Nickel Silver turquoise cuff bracelet

1970's Native American Nickel Silver turquoise cuff bracelet. Beautiful piece of natural turquoise on this cuff. I'm always astonished when I see a piece like this, of course at first I thought it was silver because it does look like silver. But now I believe it to be a nickel over brass or some other non silver or low content silver alloy. There was a time in the mid 70's-80's when silver was more expensive than it is now (and it's fairly high now) That's really the only thing that can explain a piece like this. Great looking well made cuff.