The hallmark in question is "Waterbird" or better known as the "Peyote Bird".
As to the owner...I have only been able to find a few refrences to "Tommy Singer" or his Brother-in Law" "Larry Dodge.
I have seen a lot of Native American jewelry on eBay recently with this hallmark and the style is certainly that of Tommy Singer especially the Coral/Turquoise inlay.
In any event I would say the artist has great talent and a lot of effort and thought went into creating this maker's mark.