So a while back I purchased a large lot of German stamps and covers from all eras of German postal history on Catawiki.
Now there are these greenish yellowish stamps that clearly have a Peace theme. They seem to be different varieties. I'm most curious about the one in the middle. It's slightly larger than the other two and printed on paper that's shimmery/glittery. I don't own a Michel specialized Germany catalogue yet, and I'm curious about what type of paper it is. Anyone have any ideas? I've included a picture, but you can't really see the shimmery effect on it. Only if you hold the stamp up to the light.