Hopi-style ring with unknown hallmark?

Would like more information if possible on this ring. I found one site that has a picture of the mark, but has labelled a mystery asking for help, anyone out there able to do any better? Depending on which direction you look at it, it could be CH or HJ conjoined, or some weird abstract symbol.
For some reason this will not let me attach a second pic to show the front of the ring…I’ll see if I can do it in a reply.

This is the front of it: