Crew of the Dornier Do 26 "Seemöve"; top (from the l): pilots Karl Heinz Appel and Erich Gundermann; bottom (from the l): radio operator Engelmaier, and aircraft engineer Birsner
Forgive the belated bump, but there is a cutaway drawing similar to this one in 'Flugzeug Profile' number 51 on page 7 but showing the interior details of the military version of the Do-26 including the changes to the rear fuselage where the two gun blister positions were installed.
Unfortunately the image itself is not anywhere as high quality as the one above, and also the annotated labels are not readable. I wondered if anyone knows if there's a higher resolution copy of this version anywhere?