VINTAGE: Plastic / Lucite Bead Necklace

Beads are strung on & wrapped in sturdy string, with metal for the dangling piece Beads are clear or have a natural tint Has a nautical look. Lobster claw clasp at back of neck with extra chain to adjust the length as desired. Lightweight I don't know when this was made, but my guess is 1970s or 1980s I purchased from a vintage jewelry vendor