This Duette Clip by CORO is featured in several books on Collectible Costume Jewelry. This Duette has Patent No. 1798867 dating it to 1931. Along with Coro Duette signed in script. The Birds are designed with bodies of pavéd rhinestones with the crowns, beaks, feathers and flowers done in shades of blue pink, green yellow and lavendar enamels. This Duette is in very good condition. All rhodium setting. There is a picture of the back also shown. This Duette comes apart so that the Birds can be worn individually. The Duette measures 3 3/4"L x 2 1/4"W. A marvelous and infamous addition to your Collection.