The very little known Heinkel He 116 was originally conceived in 1936 to be an ultra long-range mail plane intended to deliver airmail between Germany and Japan. Heinkel wisely chose to create a derivative of their classic He 70. Sadly, problems with the intended power plants stopped somehow the full potential of the scheme. That apart, the aircraft was basically sound. In total, 14 were produced; some for its intended role and a bunch specially developed for long-range recon military purposes. Not a world-shattering success in the end, but it wasn’t its fault.
Lovely Japanese publicity poster. Japan bought a pair of them. Arrived to Japan in April 1938, they’re operated by the Manchuria Aviation Company.