VINTAGE: Black Beaded Chain Necklace - Adjustable Length

Vintage black beaded necklace - probably from the 1970s or 1980s - not sure. Purchased from a vintage jewelry collector. Large, round bead is more translucent than the other beads. It's more like a black-brown color. Looks more vintage, and is a bit nicked. Chain with clasp closure at back of neck Can adjust to hanging down from 12" to 13 1/4" Looks great with a plunging neckline Condition: Good vintage condition. The large, circular bead is a bit nicked up.