The Priceless Ingredient" - E.R. Squibb & Sons (Ladies' Home Journal, Dec 1921)
The pattern
This still is filed under Headline · visual lockup.
Define
Headline and picture are one sentence. Remove either half and the claim disappears.
Mechanism
Lockup. The line names what the image will not. The image shows what the line cannot. They are not redundant.
Verdict
We have a picture that completes a short line: wit, contrast, or a second meaning.
Why it works
The parable does the persuasion before any selling starts - by the time Squibb is named, the reader has already accepted the general principle that the maker's honour is what she is paying for, so the brand arrives as the conclusion to an argument she agreed with. Setting the tale in Bagdad and in italic distances it from commerce and lets it be read as wisdom rather than a claim. The corporate history then supplies the verification, and its strongest device is that the buyer is the United States Government twice over, which is proof the reader cannot check but will not doubt. The product list converts abstract trust into a shopping list, and the final line repeats the parable's moral so the piece closes on the idea rather than the merchandise.
Steal this when
Use this when you sell something the buyer cannot evaluate herself and every competitor's claims look identical on the label. Establish the buying principle first as a general truth, then reveal that you are the only one who satisfies it.