Early Old Navajo Native American Turquoise Cluster Ring Stamped Uk- P

Early, Old Navajo Native American Turquoise Cluster Ring set in silver with circular decorative pattern to the shank. Stamped to the back, although the stamp is not clear so I cannot attribute the ring.

Some scratch to the silver on the back. Otherwise just shows general signs of age and wear, please look at the pictures carefully for an idea of condition.