 Popularity of 19, that was the 1942, the first one, and then each year after that, they would run these short little snippets in theaters, Periscope Films, coming out again in the 1940s and 50s, telling you to don't worry about that new car. The old one will work just fine if you make sure to buy your war bonds. Look at a few other items of the 40s and 50s and some of that patriotic feel that was going on at the time.