Flieger vor dem Aufstieg zu einem Erkundigungsflug.
(Flier before the rise of a reconnaissance flight.)
This is a World War 1 - Photogravure Postcard - unused
I believe the airplane is a Fokker M.5
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The Fokker M.5 was an unarmed single-seat monoplane aircraft designed and built by Anthony Fokker in 1913. It served as a light reconnaissance aircraft with the German army at the outbreak of World War I and was the basis for the first successful fighter aircraft in German service, the Fokker E.I.