Jewelry Necklace Black Bead Collar Choker J.C. Penny 1950s Adjustable 2 Inches

Collar necklace it is 3 inches wide all around. It is hard to judge the length but it would be about 13 inches inside and about 18 around the outside. It is ajustable at about another 3 inches. the necklace has been cleaned. Refer to photos for details