Otto Perutz
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 poster runs two registers on one sheet and keeps them physically separate: a decorative Art Nouveau image to stop the eye and a dense, hierarchical typographic block to sell to a technical buyer, divided by a hard black band so neither contaminates the other. Within the type block, size alone carries the argument - RESULTATE and SILBEREOSINPLATTEN are set largest so a skim reads best results, silver eosin plates, while the product list underneath uses a bold-then-light rhythm that lets a professional find his own item in one pass. The camera in the illustration is turned toward the viewer rather than away, so the product category is unmistakable before a word is read, and the free price list at the foot converts interest into a name and address without asking for money.
Steal this when
Use this split when one sheet has to stop a general audience and satisfy a technical one. Give the image its own uninterrupted zone, give the specifications theirs, separate them with a hard edge, and close with a free, low-risk next step rather than a sale.