Vintage Czech glass buttons Collection (4) 27mm Art Deco 1920's geometric blue black

Collection (4) 27mm Czech Bohemian Art Deco 1920's geometric blue black sew through 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: 27mm; 1.05"
Material: Vintage glass. 
Shank: sew through
Origin: N. Bohemia / Czech
Year: Vintage cca. 1920's
Condition: Original authentic condition. 
Quantity: 4