How many movies have Hans Ertl and Hans Winzeler collaborated on?

They have worked on 1 movie together! Their first movie together was Demon of the Himalayas (1935) and was their highest rated movie together. They have not worked together since Demon of the Himalayas (1935).

Role
Hans - junger Bergsteiger der Himalaya-Expedition
Role
Dr. Winkler - Expeditionsarzt