I was recently lucky enough to be given a large number of vintage posters from a retired teacher. They date from the 1950s, when she first started out teaching, and were used in Primary Schools to aid with teaching all sorts of topics including history, geography, art and science.
It is not a complete set, by any means, but there would be over 100 of them, in various conditions. Some look almost brand new, some have some fauxing at the edges, many bear the marks from being pinned or stapled to the wall, and some have been laminated in recent years.
Many of the science and nature themed posters will fit in nicely in my library, so I will be looking out for frames for them.
There are others with more random themes that I probably won’t ever use, considering my lack of wall space.