They actually still use these videos in house (with a YouTube link not a projector) - we had what they call a "Lunch-and Learn" on rear differentials and this was the opening. They did skip the first two minutes of old school motorcycle formation riding though. The rest of the video is pretty good considering it was filmed in 1937. If you look at this account, there are a bunch of GM videos from the 1930s.
https://www.youtube.com/watch?v=yYAw79386WI
-Geoff
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