The product is a vintage Coro large "Duette" blue and white rhinestones dress clip, made in the United States. This fashionable jewelry piece is perfect for occasions like Mother's Day, Christmas, anniversaries, or christenings. The white rhinestones set in rhodium-plated metal add a touch of elegance to any outfit, making it a lovely gift for a special occasion or a beautiful addition to a vintage jewelry collection. Pat # 1945268 indicating the clip was designed by Joseph P. Whitaker- - the second pattern number 161668 was a specific clip assembly patent that Coro used for many other their high end duettes