Vintage long multi strand necklace w natural river pearls, silver, new condition

Vintage handmade multi strand necklace. With lustrous river pearls that are all uniquely made by nature. The clasp is quite beautiful and stamped Silver. Not sure if it means sterling silver or some other silver purity. It can also be worn with the clasp on the front, as a decorative element. 22" long. In new condition. It came from a private collection where it was stored and not used.