Large vintage Art Deco or Edwardian faux tortoiseshell celluloid / galalith hair adornment, geometric rhinestone and double prongs

Gorgeous and very large vintage faux tortoiseshell celluloid or galalith early plastic and silver tone with paste rhinestones hair pin decoration, from the early 1900s or Art Deco period. The double horn and geometric design is very attractive, with Edwardian influence to the Art deco style. The hair piece is in very good vintage condition - remarkable for the early plastic prongs to be so secure and in such good condition.