It’s the old Bell trading post hallmark. The Bell Trading Post was built in 1946 and was in use as a Southwestern/Indian jewelry manufacturing business until 1974, that looks like one of the last styles they used. Not terribly valuable but a lot of collectors specialize in just items from there.
Thank you Severn Sound for taking the time to solve my mystery marking of The Old Bell Trading Post. I hope I can be of help to you someday.
Great Thanks again, Mel W.