"I SAW WIBW's FLYING ROOSTER" BUTTON.
1-5/8" litho showing single prop plane in flight with call letters of Topeka, Kan. radio station on the side of plane. Couple pinpoint dots off bottom extreme edge, small 1/16" black dot off top left but about 98% clean paint remaining. c. 1930s. Uncommon.
Pictures (click images to zoom in)