Hazeltine's pocket book almanac 1895 : 17th series / E. T. Hazeltine.
The pattern
This still is filed under Utility premium.
Define
The free thing is kept because it works (a calendar, a tool, a template) and the brand rides along.
Mechanism
Usefulness as media. Frequency of use is frequency of exposure. Distinct from a keepable card: here the object has a job.
Verdict
We can give something people will actually use next week.
Why it works
Its small size makes it easy to carry in a pocket, providing utility while constantly reminding the user of Piso's remedies.
Steal this when
When offering a small, portable utility item to keep your brand top-of-mind.