Well I don't know what it is actually - there are 8 "medallion" like plates all linked together - each one has a face - with 2 different alternating faces. One looks like a Zena type warrior princess angel person the other looks like a goddess or maiden. It is signed Signo Arte on the clasp but I couldn't find very much about this company or artist - well actually any info on this designer. Overall length is 7.5 inches. Based on the clasp type I'd put this one 1950-60's. This was an estate find so there is no history to tell. Condition is mint. Not sure it was ever worn.
Will ship via USPO with delivery tracking