Art Deco Czech Glass Necklace

Faceted black glass beads with clear glass tubes entirely chain strung. Clasp set with a clear colored oval. Wears at 15 inches around the neck. The dangle is 2.25 inches. The backside of the prism drop shows a few dimple like depressions near a mold line that look original to manufacture, possibly bubble areas when the glass was poured. Priced for the blemishes. Ca., 1920 and wears beautifully.