I have never seen a Coro Duette in these colors and it is definitely from the 30's. Frame for 2 clips is signed Coro Duette and Pat. No. 1798867 which puts the design in 1931. Quite amazing - no stones missing and only a couple tiny scratches on the lanvender part of blooms with none on green. The stamens are not meant to be tremblers but one does move. I can't see what's going on from either front or back. Total measurements are 3 x 1 1/4 inches. Back views show hinged fur clips for separate use. Safety pinback is good.