I have a necklace I know little about.. Please help

All I know is that it was bought in Old Town, Albuquerque NM in the 70’s. I’m wondering if anyone might know who the artist is and what it’s value might be…

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I am not sure who the hallmark belongs to, the leafs appear to be machine made and it looks like the coral is set in bezel cups. Do you have a weight of the silver? That would help give you an idea of value.