Vintage ESTATE Enamel BUTTERFLY PIN- YELLOW GOLD over BRASS OR COPPER

This beautiful 1970s butterfly is enameled over textured metal so detail can be seen in the wings. It’s a process called Baisse Taille. The metal is yellow gold over a base metal which is either brass or copper. The brooch is a about 2” vertical and 3" horizontal. It’s in good condition overall as seen in photos.