Johannes Krasenbrink, owner of a few very early VW 1500s including probably the nicest low-mileage '62 1500 Ghia on earth, sent me these photos of an amazing 1961 dealer information brochure. Titled Wir werben für den VW 1500 (We advertise the VW 1500), it shows all the different components of the Volkswagen + VW 1500 advertising campaign that could be ordered by the dealers.
It includes a few of the campaign pieces I've been able to find, including an advertising stamp (21) and a postage meter ad (23).
If I was able to read the dimensions I could have some facsimile wheat paste posters made at their original size. I'd love to see the rest of this rare brochure!