28mm antique 2 part metal mounted blue marble reverse hand painted glass button

Collectible stunning hand made art button from the beginning of the last century. With a reverse hand painted blue marble and black japanned glass cabochon set in a metal mount. A highly intricate, unusual and complicated button to make. In excellent condition.
An extremely rare collectors glass button.
Size: 28mm 1.15"
Shank: self shank
Origin: N. Bohemia / Czech
Year: Vintage cca. 1920's
Condition: Original authentic vintage condition. 
Quantity: 1