The Engineer's Thumb
- Blwyddyn: 1923
- Gwlad: United Kingdom
- Genre: Crime, Drama, Mystery
- Stiwdio: Stoll Picture Productions
- Allweddair: sherlock holmes
- Cyfarwyddwr: George Ridgwell
- Cast: Eille Norwood, Hubert Willis, Bertram Burleigh, Ward McAllister, Mercy Hatton
