Vintage Navajo Sterling Silver Ring with Natural Turquoise Size 8

From a private estate collection is this lovely sterling silver Navajo ring. It is set with a natural turquoise stone. The setting is enhanced with appliqué work that looks like lace. It is hallmarked S.B. and mark is scratched in. May be an early Sam Begay mark. 

Size 8. Face measures 1 1/8" by 7/8". It weighs 10.3 grams.