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The Mystery of Mr. X
- Bliain: 1934
- Tír: United States of America
- Seánra: Comedy, Crime, Mystery
- Stiúideo: Metro-Goldwyn-Mayer
- Eochairfhocal: diamond, jewel thief, pre-code
- Stiúrthóir: Edgar Selwyn
- Caitheadh: Robert Montgomery, Elizabeth Allan, Lewis Stone, Ralph Forbes, Henry Stephenson, Forrester Harvey