Matisse vintage copper with red/ black enamel Freeform single clip on earring

Vintage single clip on earring. Freeform modernist design cooper with red/black enamel This Matisse earring is shown on page 134 in the book of Copper Art Jewelry, A different luster. It is a beautiful piece of Freeform modern design. This is a single earring, looking for a collector of Matisse jewelry. Good vintage condition.