Help with hallmark on my ring

I’d like information about the maker of this ring. Thanks for any help.

It can be very difficult to id this type of marking, possibly even the owner who purchased it in 1976. It is Navajo style and has a good look. Wonder if same artist as your other piece? Did you purchase at the same time, place?

Unfortunately, I purchased from a collector, who didn’t have the provenance :frowning: I did wonder about the tentative, scratchy look of the “hallmark”. I guess these will remain my “mystery pieces”.