
The printing on the outside of this card claims that it's an Official Free Pass Good on All Lines of the A.H.H. & W.W.A., which makes it sound like it's a free railroad pass.
When the card is opened, however, a specially constructed "magic thumb" pops up above the edge, revealing that the "A.H.H. & W.W.A." isn't actually a railway line. Instead, the initials stand for the "American Hitch-Hiker and Weary-Walker Association."
To use the "free pass," of course, you have to "start waggling the magic thumb" on your own hand in order to hitch a ride from a passing motorist.
Traveler's Free Pass
Issued by authority of the American Hitch-Hiker and Weary-Walker Association.
Fellow travelers! What a pass!
No tickets to buy, no tires, no gas!
Whenever you want to go or come--
Just start waggling the magic thumb!