Vintage Celluloid Brown & Black Piano Key Style Collar Necklace

Vintage celluloid choker collar necklace in an omega piano key style. Necklace has three shades of brown accented with black elongated plastic beads. Necklace is double strung lays flat on the neck.
Measurements
Outer circumference 23”
Inside circumference 15 – 1/2″
Inside diameter across 4 – ¾”
Condition
Excellent Vintage