Set of 3 Vintage Enamel, Pearls, and Gold Mini Pins Butterfly, Flower, Dragonfly

Set of 3 vintage enamel/gold/pearl miniature pins. Includes a flower, butterfly, and dragonfly. Unbranded but each pin has a patent number...not sure if that's for the pin mechanism or the pin itself. Super cute and sweet. I believe these are from the 1930s or 1940s. Each pin is approximately 1/2 inch wide. Excellent condition.