Vintage oversized handmade necklace 1960/1970s

Vintage shell oversize choker/necklace I bought this necklace at an antique shop in Key West / Florida. Is one of a kind made by a local jewelry designer from the 70's. This oversized jewelry is back in trend for this spring/summer 2017. Measurements Length: 19 1/2 inches Middle shell design: 1 1/2 inch Free to ask any questions before buying, please check out my other items I'm cleaning out my closet.