Adam,
As a designer, I also need more information to respond.
There are posters and handbills from the mid-19th century that were frequently done in decorative woodtype that are highly distinctive and very American. These are the familiar "Wanted!" posters of the American West, railroad "travel" posters and theatre production posters. But as we move into the 20th century, Art Nouveau, Art Deco, Art Moderne, Bauhaus and other styles become more international in their scope and choices of fonts.
So, can you tell us more what you're looking for? And what time period?
Neil