Very interesting. The Hindenburg looks somehow fake, but not like colorized photo fake. More like larger-than-life movie poster fake. Tiny little human figures and a gigantic ship exploding in the background, hell, it even has the blue and orange thing going on. It doesn't have quite the same impact in black and white, the color really makes it pop. I can't even imagine what it must have been like to be there and see it in real life.
Most of the others look a bit fake, except for the "View from Capitol in Nashville". That just looks like it was taken yesterday.