Arizona Bracelet

I was given this bracelet by an aunt in 1970. She grew up in Phoenix and it belonged to her mother so I think it is from that area. I can see no artist marks anywhere. There is an engraved “B L” inside but that was my Aunts mother’s initials. I have destroyed it some by banging it on a guitar for 45 years. It was originally a little smaller but I couldn’t get it on my wrist so the ends were filed a bit by a jeweler. It appears to be hollow but I am not sure. I was told that there was a matching necklace but I am not sure about that. Can anyone tell me anything about this bracelet? Thanks.