Purple lined trinket box

I'm not really sure how old this is, but I love the color purple---this practically leapt into my hands! The collage on top is gorgeous enough, but when I opened the box, there is an unexpected carving on the other side. Looks like 3 birds on a branch and almost looks out of place. It is signed "Ann U.S.A" on the bottom--possibly carved into the box by the way it feels? Included a picture of the hinge for reference as well. Not evevn sure where to list this one, so Accessories it is!