There were many more poster stamps issued for the Bugra than just the two main sets for the entire expo. Some of the special sections issued their own, as did Austria for its participation. And there were stamps issued by dealers and other individual participants. The largest number were issued by the special section called "Der Frau" - "The woman." All of those are displayed on this page. You will note that there are two versions of many - one has the printers name, the other does not.

Go to the page named "Other stamps" for the rest of the miscellaneous stamps.