Hattie Carnegie vintage enamel frog bobble head trembler pin. This item is crafted out of a gold tone brushed metal foundation that forms a sitting frog. The frog is covered in a light green enameling that looks great. The back of the pin has a spring that connects to the frog's head allowing the head to bobble back and forth creating what is known as a trembler pin which is a famous style often used in Hattie Carnegie's figural costume jewelry. The head has a light green enamel as well as two blue enamel eyes with black enamel for pupils. The back of the frog has a small gold tone metal pin and locking "C" clasp that holds well and the signature "Hattie Carnegie" is inside of an oval cartouche on the back bottom of the pin. This piece measures 1 1/2" long by 1 5/8" in width and the condition is great with no scratches or chipping to the enameling.