Hey Community, I just had to post this. I think it is really interesting. A private school funding project maybe? If this post should be in another Folder, then let me know! Maybe there should be a topic called "interesting tabs" next to the topic "interesting cancellations" !
Many countries had private advertising on labels from booklet panes and sheets made for use in booklet panes; this is one. I will dig up my Michel catalog to confirm unless someone beats me to it.
EDIT:This is zusammendrucke nr. S 1.11. Pretty good cat value in my ancient catalog. Even though that's an inflated figure and Germany values have crashed in the past year, it's still a good item. It's a good-looking item for sure.