General Information
The Mainspring is a motion picture produced in the year 1917 as a Stati Uniti production. The Film was directed by Henry King, with Henry King, , Robert Ensminger, Charles Blaisdell, Cullen Landis, in the leading parts. We have currently no synopsis of this picture on file; There are no reviews of The Mainspring available.Bibliografia - Exhibitor's Trade Review, 10 March 1917 , pg 961.
- Motography, 18 August 1917 , pg 346.
- The Moving Picture World, 25 August 1917 , pg 1261.
- The Moving Picture World, 7 July 1917 , pg 138.
- The New York Dramatic Mirror, 11 August 1917 , pg 23.