The German Gun Collectors Association has an 8 page reprint of the 1930’s Brenneke Export Catalog available for purchase. Click here to go to their site and view the Catalogs they offer
Click on the following link to view a 1910 Letter from Brenneke on his illustrated letterhead RGThammenhain
The following images are courtesy of my friend Fredrik Franzen
The following article by Harald Wolf appeared in the now defunkt Hatari Times No. 6. The date of that periodical is unknown. I understand that Mr. Wolf has since passed away.
The following appeared in the 1939 (n. 31) edition of A. F. Stoeger’s catalog.
The following images are courtesy-