Ballinger was a skilled landscape, seascape and shoreline painter who wrote several books dealing with paintings those subjects (an example is here ). His works are found in several museums.
What is not clear to me from the limited information available is the arc of his career. My best guess is that, since he had training by Dunn, he probably did his illustration work in the 1920s and 30s, then shifted to fine arts. Or maybe he did fine art painting all the while and worked as an illustrator to maintain his income.
There are a few examples of his paintings found in Google searches, but I turned up only one sure example of his illustration work. Perhaps lengthy digging or better use of key words might have located Saturday Evening Post covers, but all I found were random cover images.
All this is too bad, because Ballinger seems to have known his stuff, and I would like to see more of it to be sure of that.
I don't know what magazine this appeared in, nor the date. My guess as to the latter is 1934 or thereabouts. I base this on the women's hairdos and clothing along with the fact that they are shown with alcoholic drinks (Prohibition was abolished in the USA in March of 1933). The cloisoné style is similar to that used by McClelland Barclay at times during the late 1920s and early 30s (examples are here -- scroll down). Click on the image to enlarge considerably.