While in Beijing last May, I found these very old, mass produced Mao posters (more here). These are in no way valuable other than that they represent and old era. The thin newsprint paper they are printed on is yellowing and decaying by the second. However, I love the bold designs, the two color screen printing and the demagoguery that these propaganda prints convey. I do have a soft spot for communist ideology, just not in practice.
According to Pierre of Mao Post, my posters are not authentic. He wrote me via email:
Regarding the posters you bought in Beijing, they are recents interpretations of the propaganda posters. That is, they were done by artists for commercial purposes - but not officially by the Chinese propaganda. Still they are nice looking posters. Yes, I guess the paper looks old, but this is an easy trick for the printers of these posters. If these posters were authentic they would have cost, say, at least 1,000 RMB each.
The one with Mao says "700 millions people, 700 milllions soldiers."
Here they are, hung together, in the tiny hallway toward our bedroom.