In my research I was able to find only one other of these beautiful birds. Coro designed many of these duettes and called them separable brooches. They are versatile and can be worn together or separated and used as clips to accessorize clothing or hats, purses etc. Hallmarks - Frame - Coro Duette, each of the birds is stamped Coro Metal - Rhodium Plated Base Metal Size - 2.5" x 2" Condition - Excellent vintage condition , no damage, bright sparkling rhinestones, clip mechanism in good working order.Book Reference - Fun Jewelry by Schiffer. Auctiva offers Free Image Hosting and Editing. The item "CORO Love Birds Duette Brooch Clip Enamel Rhinestone Vintage 1935 25" is in sale since Wednesday, August 21, 2019. This item is in the category "Jewelry & Watches\Vintage & Antique Jewelry\Costume\Designer, Signed\Pins, Brooches". The seller is "kraftyrose" and is located in Wilmington, Delaware. This item can be shipped worldwide.