I saw that and thought it looked much older. It's more likely from around 1905, not 1950. At that time "Malt" meant medicinal. The Pure Food and Drug Act of 1906 really limited this type of advertising for "patent medicines".
For a more detailed read you can check out this article http://sippncorn.blogspot.com/2014/01/false-advertising-and-legacy-of-duffys.html