Enameled pin, gold filled and engraved with many concentric circles in the center. A gothic inspired set of arches surrounded by delicate knotted vines. This section/ring also has taille d'épargne black enamel. There is a final ring of engraved border, probably machine turned. The back is convex, possible brass cover. Tube hinge, c clasp and pin stem extends beyond the pin. 3/4" diameter