- Country: USA
- Genres: Action, Adventure, Romance
- Release: 1932-02-05
- Director: Bruce Mitchell
- Writers: Carl Krusada
- Language: English
- Stars: Jack Perrin , Ben Corbett , Elinor Fair , Olin Francis , Richard Cramer , George Chesebro , Jimmy Aubrey , C.V. Bussey , Ruth Renick , Starlight the Horse
- Runtime: 60 min
- Awards: N/A
- AKA: The Mysterious Rider (United Kingdom) , 45 Calibre Echo , 45 Calibre Echo (United States of America)
- Plot: Remade by Bernard B. Ray and Harry S. Webb's Reliable Pictures in 1935, also starring Jack Perrin and using the same plot: (Jack Perrin) A cowhand, and his sidekick, Bennie (Ben Corbett) come to the Texas border country looking for the saloon owner (Richard Cramer), in a Texas border town, who had lured the cowhand's sister into white-slavery bondage in Mexico, under the pretense she had been hired as the new school teacher for the town in Texas. . But the man doesn't want to be found and has hired some gunmen to see that he isn't.
- IMDB:tt0193957
45 Calibre Echo Cast · · · ALL
Bruce Mitchell
Director
Jack Perrin
Jack
Ben Corbett
Bennie
Elinor Fair
Betty
Olin Francis
Burly Henchman
Richard Cramer
Saloon Owner
George Chesebro
Henchman
Jimmy Aubrey
Jim - the Sidekick
C.V. Bussey
Sheriff
Ruth Renick
Jack's Sister