How many movies have Paul Rehkopf and Rudolf Klein-Rogge acted in together?

They have worked on 6 movies together! Their first movie together was Four Around the Woman (1921) while their highest rated movie together was The Testament of Dr. Mabuse (1933). They have not worked together since Robert Koch, der Bekämpfer des Todes (1939). They are most known for their drama films together.

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Wissenschaftler im Pathologischen Institu
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Rechnungsrat
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Varieté-Agent Sylviani
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Simpat Karamanian / Arut Akkunian