We all know that the He 111 started its life disguised as a passenger plane for the Deutsche Lufthansa DLH. In reality they were spy planes fitted with camera's and flown by Luftwaffe pilots wearing DLH uniforms. In spite of this, a small batch of He 111 was supplied for just commercial flying. DLH flew these planes for a short period only since they proved to be uneconomical.
This He 111 variant was fitted with radial air-cooled engines and also visited in the late thirties Schiphol airport. They were soon taken over by the Luftwaffe as transport and liaison/training aircraft.