Most of these posters are from the 1930s and 40s.
Definitely worth checking out.
note: I spent some time trying to embed the slide show on the House of Spode, but just couldn't figure out how. That's the difficult part of being barely computer literate. So instead I'm just offering a small tasting of the many awesome posters you can see at the Boston Public Library Flickr Set page.
Again, I highly recommend you check out the full set here.
