Cameo bar pin made from unknown metal. Openwork "lace work" bar pin. Cameo is carved delicately into profile of young woman, bezel set. Metal is covered with 1/40 10 kt rolled gold plate, noted on the back. The plating is worn off on the ends. Round hinge, and older style safety clasp. Made by ALLCO, trademark of A. L. Lindroth Co. opening in 1896 and closed by 1937 (1950?). Attleboro jewelry manufacturers were on the low end of quality in American jewelry. 1 5/8" long 1/2' wide