Yes, this looks like an essay, and reads like an essay, but it is, in fact, an advertisement.A
published in the January 2, 1915 Saturday Evening Post
Then again, if it looks like an essay and reads like an essay, then it is an essay.
If its purpose is to sell something, then it is an advertisement.
Well, for pure reading interest, I call it an essay.
For the purpose of adding it to my Vintage Media Collection
I call it an advertisement.