OTTO HILLIG (1874-1954) amerikanischer Fotograf dt. Herkunft, Pionier der Luftfahrtfotografie / noted photographer and pioneer of aerial photography; ROGER Q. WILLIAMS (1894-1976) American aviator. He established The Roger Q. Williams School of

OTTO HILLIG (1874-1954) amerikanischer Fotograf dt. Herkunft, Pionier der Luftfahrtfotografie / noted photographer and pioneer of aerial photography; ROGER Q. WILLIAMS (1894-1976) American aviator. He established The Roger Q. Williams School of Aeronautics. He designed the Yankee Aerocoupe.

Luftpostumschlag (blanko, airplane from New York to Greece), von beiden Luftfahrtpionieren in Tinte eigenhändig signiert