I inherited this necklace from my mother when she passed a year ago, the Hallmark can be seen on the left side clasp, which is stamped GERONIMO with a capital G with an arrow going through it from the right to the left. I will see if I can get a better close up of it in a couple of days.
Curious if anyone has any information on the history and/or value of the piece
Close up of the hallmark