Over The Top Enamel Necklace Set !

This groovy, and loud four piece set sneakily called to me from the costume jewelry table at a friend's garage sale. turn's out, her mom actually WORE this set back in the early 7o's !! the cuff has a spring tension closure, the earring's have the traditional pierced hook's, the necklace has a non removable, double hinged 3 piece pendant the double chain's that hold's the pendant are 18", and 20". amazingly, the necklace/pendant isn't very heavy, and although it might be right back in style again, I won't be wearing it. any guess what the "mystery metal" is ? vermeil ? whoever made it took the time to "deburr" the back side of all the "cut out" hole's on every piece of jewelry, before it it was coated in the gold coating. there are no maker's mark's, number's, or symbol's anywhere to be found on any of the piece's.