Heinkel He 70 D, D-UBIN, "Falke", Werknummer 709, operated by Deutsche Lufthansa, photographed approximately 1936. Photo was originally featured in Transaer 1937 - Handbuch des internationalen Luftverkehrs [Handbook Of International Air Transport], edited by Fischer von Poturzyn, Dr. Heinz Orlovius, and August Dresel, 538 pages, published as an edition of 2000 copies, by Richard Pflaum Verlag, Munich, Germany, 1937. (Fischer collection)