The two films, Dearth of a Salesman and Insomnia is Good for You, were uncovered in a skip outside the offices of Park Lane Films.
Film buff Robert Farrow had kept the reels among 21 film cans retrieved from the skip since 1996, when he finally opened them and discovered what was inside. Following restoration work, the films are now ready to be shown at the opening gala of the Southend Film Festival in Essex on 1 May.
After the event, the films are expected to tour festivals around the world.
Tickets for the festival are available through www.visitsouthend.co.uk