(0 votes, average: 0.00/10)- Country: France
- Genres: Short
- Release: 1918-04-05
- Director: Jacques Grétillat
- Writers: Georges Courteline
- Language: None | French
- Stars: Charles Lamy , Léon Bernard
- Runtime: min
- Awards: N/A
- AKA: Un client sérieux (France, French Republic) , Un client sérieux
- Plot: N/A
- IMDB:tt0485732
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