Vintage online 1940s Era Sterling Silver Leaf Umbrella Brooch Pin

This is a vintage sterling silver leaf umbrella brooch from the 1930s - 1940s era that is unique and one of a kind. It is marked "Ster" very faintly on the handle and tests positive online for sterling silver. The pin back opens and closes as it should. The brooch uniqueness and style tell me it's from the 1930s or 1940s. Sold as is.