Le mystère du 421
| MPAA Rating: | NR |
| Genre: | Adventure, Drama, Mystery, Thriller |
| Country: | Belgium |
| Produced By: | Mario Bruitte, Delamar |
| Directed By: | Léopold Simons |
| Written By: | Léopold Simons |
| Cast: | Paul Robert, Zizi Festerat, Walter Ruffax, Ludy Sambi, Jean Darwels, Léopold Simons, Raymond Vazelli, Pradelle, Guy Favières, André Duhamel, Suzanne Christy, Edouard Bréville, Line Dariel, Hélène Ourgel |
| In Theaters: | Mar 01, 1938 |
| Runtime: | 1 hour 15 minutes |
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