The fourteenth documentary of one hundred forty works by Milanese Guido Guerrasio. A surprising testimonial of Milanese transport in the early Fifties, when the «legendary» old Peg Leg was put in storage, to be replaced by more modern trains. Shown at the Venice Film Festival (1953), this film is a good example of a job still entirely to be tackled: explore the enormous and forgotten world of Italian documentaries from 1945 to 1970.