Grey's Thirteenth Investigation

Grey's Thirteenth Investigation is a 1937 French crime film directed by Pierre Maudru and starring Maurice Lagrenée, Raymond Cordy and Colette Darfeuil. It was based on play by Max Viterbo, inspired by the character of Inspector Grey created by Alfred Gragnon. It was the third of series of four films featuring the detective. The film's sets were designed by the art director Lucien Carré.

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

Poster © the film's rights holders.