Identifying a Navajo Artist - Hallmark R.A.B.Q.

I am trying to identify the artist who created the pieces in the attached photographs. They are stamped “Navajo R.A.B.Q.” & “sterling”. The work is inlayed turquoise and other stones. I have searched Billie Hougart’s “Native American & Southwestern Silver Hallmarks, 5th Edition” and even reached out to his widow who confirmed that she isn’t familiar with this hallmark. The work is so stunning, it is hard to believe the artist isn’t known. Any help would be appreciated.
Thank you

1 Like