Early He 111 fast airliner, one of a few delivered to DLH in 1936. In reference to the single-engined He 70 Blitz the type was called 'Doppel-Blitz'. Koolhoven FK.50 HB-AMO is visible in another shot, probably taken on the same day, thus dating the photos before 10 September 1937, the crash date of the FK-50. Photo from: ETH-Bibliothek Zürich
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