Perhaps Akah was anticipating the release of quantities of commercial KKWs for sale to the public, after the production quota was released to standing orders from the SA and other party or government agencies? You know I had completely missed the section on proof marks. Good call on that. Inasmuch as the new proof law was passed June 7, 1939 and published with all rules and regulations on July 15, 1939, the catalog would have to pre-date that month long period.
Akah must have switched to the more elaborate cover in the 1930s. My 1929 issue has a rather dull cover, but the soft-cover issues of 1935 Katalog Nr. 150 and 1939's Nr. 175 both have the trademark embossed in gold, as well as the Haupt-Katalog title page with full page numbering.