Vintage Enamel and Rhinestone Bee Brooch Unsigned Coro?

Stunning vintage brooch. Bee brooch with black enamel, silver tone metal, and painted accents. The bee has red stone eyes. I think it is missing 2 rhinestone/crystals and could use light cleaning. Almost identical design to the marked Coro bee brooches, but I couldn't find a signature on this one. If this is Coro, it's probably from the 1940s or 50s and is gold and enamel over sterling. Unfortunately, I am unable to test this piece.