Vintage Natural and Soft Black Carved Celluloid Choker Necklace

This Art Deco heavily textured vintage necklace features natural ridged round beads set off by soft black and natural fluted end caps with saucer spacers. This necklace has been loved and could use a cleaning. The approximate length of the necklace is 16" and the closure is a spring ring clasp. My sister-in-law was an avid collector of so many things, jewelry was just one category. She knew everything about each and every one of her pieces but unfortunately she is no longer able to tell us. I'm not an expert - I just offered to help find new homes for her beloved pieces. This is a vintage piece and has evidence of wear that is appropriate for its age. Please examine all photos closely for condition.