This was a direct mailer concept for Milford Mills Type Foundry. This was to promote a font of theirs. Below is a spec sheet introducing the font "Nations."
This is the other half of the same side showing the front of the mailer as well as a teaser into the rest of the piece of collateral.
Here is the complete direct mailer opened up from the front.
And here is the complete direct mailer opened up from the back.
