Dr. Thomas' Eclectric Oil : trial by jury / [Foster, Milburn & Co.].
The pattern
This still is filed under Keepable trade card.
Define
A small card people keep (pretty, useful, or collectible) that carries the brand after the encounter.
Mechanism
Retention object. The gift is the media. Recall is paid for by usefulness or delight, not by repetition.
Verdict
We can put a physical or digital keepable in someone's pocket and they will not throw it away.
Why it works
The charming visual hook on the front grabs attention, while the back leverages a clever 'Trial by Jury' metaphor to dump a high volume of rapid-fire testimonials proving the product works.
Steal this when
You have an abundance of customer testimonials and want to frame them as overwhelming, irrefutable evidence.