Rod,
As with most things German revenue-related, the answer is Martin Erler. The final numbered volume of his series of revenue catalogs is Vol XVIII - Gemeindegebührenmarken / Municipal Fee Stamps. It's a 20-part volume listing the municipal fee stamps of a huge number of German cities.

The stamp shown above would be in the "R" sub-volume.

However, as you can see from this scan, the lower values are listed, but not the 1 Reichsmark value. This is not uncommon with certain volumes of Erler. The sheer volume of possible revenues and the lack of any real cataloging system at the time means that there are often gaps and unknown issues of which Erler himself was unaware or didn't list for some reason.
