How the Ford Rouge Plant uses science and scientific measurement to produce Ford cars. Circa 1939. Kind of sounds like Frank Nelson narrating but I don't think it is.
National Archives Identifier: 91522 and National Archives Identifier: 93353 "All rights were conveyed to the U.S. Government on Nov. 28, 1962. However, proprietary rights or existing copyright in footage obtained from other sources by Ford Motor Company may exist."

The Story Of An Electric Meter c1922
"Shows the manufacture of electric meters, particularly the "H-type" alternating current meter, and some of their uses. Reels 1 & 2 consist of a tour through the Sangamo Electric Co., Springfield, Ill., showing how the "H-type" meter is made. Reel 3 shows the making of "D-5" and "N" direct current meters. Includes views of electrical transportation and industrial equipment using these and other types of meters."
National Archives Identifier: 12409