Vintage 1930s Coro Duette Signed PAT 1798267

Vintage 1930s Coro Duette Clear Rhinestone Encrusted Rhodium Plated Brooch. Silver Tone Dress Clip, Shoe Clip. Art Deco Duette, Double Clip Brooch. Very Good Vintage Pre-Loved Condition. Signed Coro Duette and PAT 1798267. There are at least 2 tiny crystals missing that can be easily replaced, if desired. Also, it needs a good cleaning and I'm too scared to damage it. This is a gorgeous piece! :)