Victorian book chain Etruscan style sardonyx cameo locket W & S Blackinton Company. j-vc-nl536

Victorian book chain sardonyx cameo locket W & S Blackinton Company.  The locket has an Etruscan style face.  Unmarked gold filled. Spring ring closure,    Chain is 17 inches long, 3/8 inches wide . The links are very intricate with 5 layers of metal and are 1/4 inch in thickness.  Locket  with link hangs 3-1/2 inches. Locket is 1-3/8 inches wide. There is a small darkened area on the face of the locket. Stamped W & SB on inside of locket. The book chain is spectacular and in very good condition.