Stumbled upon this website from a WOFF thread over on SimHQ. Lots of interesting stuff here, like the Greneta Street Army (http://www.retronaut.com/2011/08/the-grenata-street-army-1915/?utm_content=bufferd1ba0&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer) (even though I "played" war as a kid, I found the photos a bit sad). Interior of the Hindenburg (http://www.retronaut.com/2011/04/inside-the-hindenburg-in-colour/), Occupied Paris (1940) (http://www.retronaut.com/2010/12/colour-photographs-of-occupied-paris/), Construction of the USS Macon (http://www.retronaut.com/2011/08/construction-of-the-uss-macon-airship-c-1932/), and most importantly Gil Elvgren's Pin-Up Girls: Before & after (http://www.retronaut.com/2012/05/pin-up-girls-before-and-after-ii-1950s/)...and lots more.
::) I see Bartheart already found this site way back http://grogheads.com/forums/index.php?topic=2105.0