Vintage silver round medallion on long chain

This is my 1970's disco diva necklace. I wore it with a long striped maxi dress and felt like Rhoda. Gorgeous long rope chain with circular silver medallion. For reference the medallion is about the size of soda can. Metal is a silver tone with some patina that gives it s true vintage flair. This is a vintage piece from the 1960s/1970s.