A World War II Nazi German Third Reich NSFK balloon pilots badge of the National Socialist Flyers Corps, the paramilitary aviation organization of the Nazi Party in Germany from 1937 to 1945. Features a balloon in the middle surmounted by a NSFK emblem and swastika, within an oak leaf wreath. With a pin back with an integral hinge and wire catch. Numbered with engraving, 231240, on the backside. Second World War Nazi German Historical Collectibles And Memorabilia.