Czechoslovakia was a county that existed from 1918 until a peaceful dissolution in 1993. The county spilt into independent Czech Republic and Slovakia. These rings are set in a gold tone metal with a filigree design. The 26 Cameos are Celluloid and in black, blue, green and an orange red. I believe the metal is Brass. They are in the original box. The sizes are varied from a 5 to 7. This is considered old stock from the 1930's to1940's. These rings are in excellent antique condition and very collectable. These are from my private collection.