I tried to find something for the initials, but, no luck, sorry .. It looks like a woodcut, no? Or a litho? Anyways there are good sites to look at for stuff like this, I like this site, it has many filter options, look for the grey bar, with search filter in it, and click "open", awesome no? Maybe its handy for you too, or intresting to just browse. Anyways, there are so many unknown artists, it could be Georg Kolbe? He also did 3rd Reich things. But the Kolbe style, looks different. Well, maybe someday G. K. will turn up
