Lot (18) 18mm Czech Art Deco 1920's vintage geometric black glass buttons

Lot (18) 18mm Czech Art Deco 1920's vintage geometric 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 will have rough edges.
For jewelry making, fashion design, sewing and crafting.

Size: 18mm; 11/16"
Material: Vintage glass. 
Shank: self shank
Origin: N. Bohemia / Czech
Year: Vintage cca. 1920's
Condition: Original authentic condition. 
Quantity: 18