The Great Office Mystery
- Jaro: 1928
- Lando: United States of America
- Ĝenro: Crime, Drama
- Studio: British Filmcraft Productions
- Ŝlosilvorto: sexton blake
- Direktoro: George A. Cooper
- Rolantaro: Langhorn Burton, Mickey Brantford, Fred Raynham, Gabrielle Morton, Ronnie Curtis