Vintage Original by Robert red enamel apple brooch

Signed Original by Robert vintage Apple brooch. The base is gold tone and the front has red and green enamel. There is a tan colored worm coming out of the apple. I am unsure if there was originally a rhinestone on the head of the worm. There is no stone there now. Measures 2 1/4” h x 1 1/2” w. In excellent condition with the possibility of a missing rhinestone noted.