The second image is of an effigy. It may be of Walt or of Gunther Lessing the Disney legal rep.
The next image shows a great picket sign featuring Walt caricatured as the Reluctant Dragon.
The fourth image shows a great Jiminy Cricket sign. The anti-strike sign hanging off the studio building is interesting.
I would like to thank Bob Cowan (RCowan@mywdo.com) for letting me post the images. I will post some more images tomorrow.