Vintage Art Deco rare jet glass flat ring with rhinestone settings, 1920s France 23mm, Set of 5. b11-bw-2114

Vintage Art Deco jet glass flat back ring. each with two rhinestone settings. . 80-90 year old glass bead, 23mm. France, 1920s. Uncirculated condition, very rare and very limited stock. 5 pieces.