Good Morning - Have You Used Pears' Soap?" (Life, Aug 1 1889; cropped from ad page)
The pattern
This still is filed under Iconic figure claim.
Define
A single figure, drawn, silhouetted, or posed, is the whole claim. You can read it across a street.
Mechanism
Compression into a body. The figure is not decoration. It is the sentence. Distance-legibility is the test.
Verdict
Poster scale, outdoor, packaging at a glance
Why it works
The line is not a claim, it is a hijack of a phrase the reader was going to say that morning anyway, so every greeting exchanged in the street becomes a free repetition of the ad. The two halves are set in deliberately opposed voices - a warm engraved script for the human greeting, a flat mechanical roman for the selling question - so friendliness and sales pitch never compete for the same attention. Nothing is claimed about the soap at all: the brand name is simply the largest word in the line, and the entire burden of the ad is recall.
Steal this when
Use this when awareness rather than persuasion is the job and you can bolt the brand onto a phrase people already say daily. It only pays off with heavy frequency and a line short enough that people repeat it as a joke.