The discovery of America : Ayer's Sarsaparilla / Dr. J.C. Ayer & 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 visual joke (an anachronistic billboard in the New World) is unexpected and humorous, ensuring the card will be looked at, laughed at, and kept as a novelty.
Steal this when
You want to use surreal humor or historical anachronism to make a trade card or visual ad highly memorable and shareable.