Vintage Enamel Butterfly Brooch.

Vintage butterfly is in good used condition with light surface scratching and slight paint discoloration from age. Reverse shows what I believe to be a small amount of rust from age, See photos Brooch features a simply painted white butterfly over enamel (I believe) with brown antenna. See photos for measurements No Hallmark found I don't know much else about this brooch other than it was purchased by my grandma and found prior to her estate sale. Questions? Please ask prior to purchase.