I found this today while rummaging around in the shack. It is starting to fall apart so I figured I better digitize it before it turns into dust.
July 24, 1936. 7 am in Central Germany. 29.0 degrees Centigrade. Clear skies? German Shortwave Receiving Station DE 2518/F monitored W5AIR's contact with Irish station EI7F on 20 meter CW. The receiver was an OV2 Schnell tube (almost certainly a regen) fed by a 38.5 meter long antenna.
Conditions must have been pretty good -- they were approaching the peak of sunspot cycle 17.