This free Science and Technology of WWII poster is no longer avilable to ship, but they have a full-res you can download & print. They are also taking requests to be notified when they restock as well.
Hopefully they have a picture of a Spitfire on here because it's by far one of the coolest plane ever. How can you not love a plane with a name as awesome as that? In fact, I don't care what my future wife says, I've just decided on the name of my first born. Aren't I a catch, ladies?