You never know what you'll find on the Retrofuturs blog, it shows a real mixed bag from the last couple of centuries. Stéphane uses some of these as the basis for his design and illustration - here are some of my favourites from the blog... http://retrofuturs.posterous.com/
Some seriously cool graphics on these Atari Game Manuals - Set by Joe Krai on Flickr http://www.flickr.com/photos/joekral/sets/72157594432670289/
Love the illustrations in this great 1960's book that 'Shelf Life Taste test' on Flickr found at a Thrift shop for $2.99 - see set here http://www.flickr.com/photos/36878773@N07/sets/72157621962894177/
Entertaining Around The Clock, by Editors at Esquire Magazine with Scotty and Ronnie Welch - Illustrated and Designed by Seymour Chwast
A collection of retro and propaganda Space race graphics...full pics here http://www.flickr.com/photos/kathykavan/galleries/72157623445516667/#photo_22...
A little collection I've put together of graphically rich retro stamps - see it here http://www.flickr.com/photos/kathykavan/galleries/72157623433662355/