Czech glass buttons Collection (4) Art Deco vintage geometric faceted black

Collection (4) Czech Bohemian Art Deco 1920's geometric faceted black glass buttons. Premium quality vintage Czech glass buttons, demonstrating the skills of early C20th glass button makers. These were hand molded and hand trimmed and may have slightly unpolished edges and nicks.
For jewelry making, fashion design, sewing and crafting.

Size: 13 - 28mm; 8/16" - 1.05"
Material: Vintage glass. 
Shank: metal box 4 way
Origin: N. Bohemia / Czech
Year: Vintage cca. 1920's
Condition: Original authentic condition. 
Quantity: 4