Need ID help with this concho belt

This one stumps me… would love to know if these stones come from the same mine, and if so, your thoughts on which mine. Also the age and help to identify the maker. The mark on the back says Sterling Handmade and what looks to be a JF entwined. Silver on copper… Thoughts? There are 9 conchos in total.

Looks like Kingman, silver over copper. I came across a reference to a felix jeanine tsinajinnie who seem to do variations of the JF conjoined, but could not find any examples of their work or hallmark.

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Interesting… I will look into that one… thanks!