Close Harmony (1942)

General Motors made this wartime film to explain to the general public why it was taking so long for factories to retool for war production. A guy in a barbershop explains to everybody in the shop that retooling involves not only installing new machinery, but getting new materials, drawing up new manufacturing plans, and retraining workers. In case this gets boring, theres an African-American porter present to provide comic relief in the form of racist stereotypes. This film has the breezy Jam Handy style applied to wartime content, which means its fairly campy, though the main characters lecture gets tedious after awhile. It does have quite a bit of historical interest in that it gives you an idea of some of the rumors going around about war production in the early days of the war. Producer: Jam Handy Productions