This is the famous and highly collectible "Quivering Camellias Duette" by Adolph Katz for Coro. The Coro Duette mechanism has the patent number 1798867. The green enamel with clear rhinestones and faux pearls are a beautiful combination done in this design. The piece is in very good to excellent vintage condition - all rhinestones are present and secure, and the mechanism works perfectly. The trembler springs and clips are in great shape with no stretching or pulling. It measures approximately 3" x 1.5".