Vintage, 80’s, Navy, Enameled Necklace, Choker Gold & Silver Metal

Vintage, 80’s, navy enamel over gold metal necklace with silver trim. 13” long from end to end NOT INCLUDING the 4” extender on one side. Another 1 1/2” on the clasp side. In excellent vintage condition. Fits like a choker or can use the extra 5 1/2” to extend it. 1” top to bottom. I could not find a brand name on it. No chips in the enamel. No color missing from the gold and silver part of the necklace. The extender has darkened with age, but is still gold colored.