The Strengths of Mr. Wens

Monsieur Wens Holds the Trump Cards is a 1947 French-Belgian mystery crime film directed by Emile-Georges De Meyst and starring Louis Salou, Marie Déa and Claudine Dupuis. It is based on the 1932 novel of the same title by Belgian author Stanislas-André Steeman featuring the fictional detective Monsieur Wens. The film's sets were designed by the art director René Salme.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.