Frigidaire factories in Dayton Ohio (GM subsidiary, hence a Jam Handy Production) filmed quite extensively; was probably a PR film for war workers either to give a morale boost or convince them how precise this stuff had to be done.

Hey! Was that my uncle Stanley at 6:04 wearing a white shirt and blue pants in that bunch walking out of that plant? I could swear.

Another one in the series of We used to make ____ in our factories, now look what were making because of the war! WAR PARTS! And look who weve hired! Women! Young People! Old People! Wives! Negroes! Honestly, there are dozens of films like this, and this doesnt have anything that doesnt make itself remarkable.