The beads appear to be Venetian, early 1900s. When I cut the strand (the necklace was too short to be comfortable, about 15 1/2") I found that the beads were strung on fine nylon monofilament. I looked this up and found that nylon monofilament was introduced in 1939.

So, I'm wondering if the necklace dates from the 1940s, or whether it was originally from an earlier period, and then re-strung after 1939.

The light patina on the brass bead caps, and the age of the barrel screw clasp, seem to indicate 1920s - 1930s, so my thinking is that the necklace was re-strung.

Any input would be helpful!