How many movies have Jan W. Speerger and Vladimír Pospíšil-Born acted in together?

They have worked on 13 movies together! Their first movie together was Evin hřích (1919) while their highest rated movie together was Polská krev (1934). They have not worked together since Minulost Jany Kosinové (1940). They are most known for their comedy films together.