NSFK (Nationalsozialistisches Fliegerkorps) Sponsoring Member's Badge - 'Förderer'. These membership badges were issued for wear to German nationals, over the age of 18, who contributed regular monthly contributions to the NSFK. The 'F' at the bottom stands for 'Förderer' (Sponsor). The badge is nicely maker marked with the logo of the company of 'Gustav Brehmer' in Markneukirchen, the badge is also marked with 'Ges.Gesch'. Rare original badge in very good condition!