How many movies have Eugen Guenther and H.W. Czech collaborated on?

They have worked on 1 movie together! Their first movie together was Der Balletterzherzog. Ein Wiener Spiel von Tanz und Liebe (1926) and was their highest rated movie together. They have not worked together since Der Balletterzherzog. Ein Wiener Spiel von Tanz und Liebe (1926).