Jam Handy had a long career producing industrial films for big industrial companies. While Ford had its own film division, General Motors, in particular its Chevrolet division, turned to Handy for short subjects to tout its wares. What has mostly come down is the two reeler which showed in excruciating detail some point of technology that you couldn't explain five minutes after seeing the film, but now you understood it and would buy Chevvies because they were superior -- I've seen the one about the differential gear three times and still have no idea what it's about.
Occasionally, though, they turned out a short that was just for fun. This one-reeler is an example. We see a young boy listening to a radio show about the modern west and we also see the actors and sound effects men at the studio, producing those effects through means that bear no relationship to what they are mimicking.
It's a soft sale version of the promise to be forthcoming. "We're showing you how these things are done. You can rely on us to be honest." And it's interesting to see how these effects are achieved.