Large circa 1940s enameled flower brooch retailer

Here is a big floral brooch from the early 1940s. The brooch has blue flower withe yellow accents and pearl centers. Green enameled leaves and silver tone metal complete the look. This reminds me of Coro and Trifari pieces of the early 40s but there is no signature on this brooch and a search retailer of patent designs did not come up with a match.
This brooch measures almost 4 inches or 10 cm from top to bottom and it is 2 inches or 5 cm wide. This brooch is in quite good vintage condition with intact enamel and properly functioning roll over safety catch.

H401