This is an attractive vintage blue enameled copper pendant on copper necklace chain. The pendant is enameled on both sides and has 3 discs hanging from it. The matching copper chain is 24" long and has a spring ring clasp.
The pendant measures 2.25" x 2".
Condition is good, but for a tiny flake of enamel missing from one of the dangling discs near the attachment hole.
I estimate that this necklace dates from circa 1970s.