This pin may be solid gold, it is heavy and there is no evidence of other metals. It appears to be stylized in Victorian Etruscan Revival style with balls on the ends of the bar and 3 granulations on the center motif. Taille d'epargné black enameling on both the front and back of the bar and on one ball . Some enameling is missing on the left ball. Detailing of pin suggests it was not for low end of market. Tube hinge and c clasp. Pin stem extends beyond the clasp. 1 11/16" long. 1/4" wide