Royal Baking Powder makes dainties for Christmas (1895) - poster
The pattern
This still is filed under Demonstration ad.
Define
The product does the arguing. The viewer sees the thing work, not a slogan about the thing working.
Mechanism
Proof by performance. The claim is the action: a visible, testable result the reader can replay.
Verdict
We can show a result in seconds
Why it works
The headline is a complete sentence broken across the top and bottom bands, so the picture is physically inside the claim and the eye has to cross the demonstration to finish reading. Parrish fills every surface with pattern except the cake and the face, so the two things that matter are the only places the eye can rest. Tying a commodity ingredient to a fixed calendar occasion converts an undifferentiated purchase into a dated one, which is the whole strategic move: nobody experiments with a new baking powder on Christmas.
Steal this when
Steal this when you sell a commodity input and need a reason for someone to buy now rather than eventually; bolt it to an occasion where failure is unacceptable. The split headline wrapping a demonstration image is the layout to reuse.