Description: COLLECTION OF VINTAGE ENAMEL ON COPPER JEWELRY red base multicolored enamel circle pin, approx. 1 7/8 inches diameter; red base multicolored enamel on copper screw back earrings depicting artist's palette; black base multicolored enamel on copper screw back earrings depicting artist's palette; enamel on metal circle pin, approx. 1 1/2 inches diameter, floral pattern, signed Hogan-Bolas; matching screw back earrings stamped Hogan-Bolas; red and black enamel on copper in leaf motif stamped Matisse c) Renior; red and black enamel on copper modernist clip earrings stamped Matisse; red, orange and black enamel clip earrings (8)