The Coro Craft Mallard brooch is in great condition, retains original clear rhinestone, retains all the enamel paint, the lucite Jelly Belly in excellent condition free of scratches.
The Coro Craft Mallard brooch is a book piece and can be found in Brunialti's Book Volume 2. American Costume Jewelry Art and Industry page 202.
Brooch is by Adolph Katz, patent # 137356, introduced in February/22/1944. In the book it states Mallard brooch is gold plated Sterling. Marked in back as shown.
Brooch measures 2 inch wide from the tip of his beak, to the end of his tail, x 2 inch tall from the tallest points.