SCARCE ONLY 35 ISSUED - SEE PHOTO WITH NEIL ARMSTRONG - HANS ROSSBACH SIGNED LIMITED EDITION POSTAL COVER NUMBER 17 OF 35 - SIGNED BY GERMAN AVIATION PIONEER BRUNO POELKE - Cover was posted in 1971. Bruno Poelke born 1883 in East Prussia died August 9th 1975 in Frankfurt was a German aviation pioneer from Frankfurt am Main. Poelke along with the Wright brothers in America, some French people and Otto Lilienthal, was one of the first to design flying  machines. Minor scuffing bottom left corner of reverse (see scan) otherwise in very good condition. COMES WITH THREE PHOTOS.