VINTAGE Ingrid Cusson Gold Tone Hummingbird Bird Pin Brooch

Fabulous vintage brooch from rare designer Ingrid Cusson. Gold tone metal of some type of bird; looks like a hummingbird. Measures approximately 3" long x 3" high. Overall beautiful vintage condition; please note there is a small black mark (only visible at certain angles) at the top wing. I did not try to clean this so not sure if it will come off but it is hardly noticeable but wanted to mention.