JR Birdmen of America collectors pin

Image Description
This collectors item is from the 1930's from an aviation inspired kids club. The pin is 1 1/2" wide by 1/2" tall and is in excellent condition. It is gold colored (over brass) with red, white & blue enamel inlay for a flag shield design. A pair of tiny holes are at bottom where small bars were to be added as member advanced in rank.
It has a c-clasp, and is marked with Lambert Brothers New York on the back.
Approximate Price/Value: $20