Very interesting piece ! I’ve never seen anything like it nor have I seen a hallmark like that. I would guess it is not Native American made but perhaps made by a US artisan or one from another country. I showed the photos to everyone here and none thought it was Native American made, but each had a different “guess” as to its origin:
I’m posting it in hopes that someone else might be able to provide you with more information.
If we received something like this in an estate lot, we would state origin unknown and put in in the