Vintage 1/20 12ktgf gold black white oval cameo necklace & earrings set

I don't know how old this set is but I was told 1970s. Includes post hold dangle earrings, necklace pendant with 18" fine chain. The back of the clasp of the pendant reads 1/20 12Ktgf so it's gold filled meaning it has a thick gold coating over another metal, and it's all a matching set. I am not a jeweler so I'm not sure of the full composition or what the cameos are made of. In great shape and has been stored in a jewelry box for most of its life. Smoke free and fast shipping. Check out my other listings I have lots more and love to bundle and save you on shipping!