This is a beautiful rare Art Deco Coro Duette rhinestone brooch that was patented in 1931. Each half of the brooch can be unclipped from the pin-frame and worn as 2 hair clips (scarf or lapel pin).
It is in stunning condition. I only found a couple of spots of wear in the middle which can't be seen while being worn.
Measures 3 1/4" x 1 1/2".