Necklace - 1950's double strand, Made in W Germany

This is a beautiful vintage black plastic double strand necklace. Research seems to show it as 1950's. The clasp says: Made in West Germany. So, between 1949 - 1990. 20" As I was photographing, I saw that one of the threads on one strand have begun to come undone. It is staying connected at moment. But, does need restrung. I leave that for the buyer to handle. This would be a perfect piece for someone who likes the retro 50's looks and wants authenticity in their wardrobe / accessories.