Vintage bone? or ? necklace. The beads are 1920's or earlier? That is a guess. Screw barrel clasp.
It measures approx. 21" long. The largest bead is 3/4" long. The beads are not perfectly round. The weight is approx. 58.5 grams. The beads look way older than the clasp. A few of the beads have yellowed to an almost a tea stained patina from their age which only adds to the charm. No cracks in any beads. And they are in great shape.