Squared-off lettering, no serifs, descender on the 'g' and tail of the 'e' end horizontally, lowercase 't' has the crossbar only to the right of the vertical and no hook at the bottom, junctions of the 'r' and 'n' meet at a right-angle with no "notch" (sorry for the bad description), 'i' has a rectangular dot (not circular).
Common font on WW2-era German administrative/military signage, but obviously not ornate like Fraktur or Antiqua..
Tried font-id sites like whatfontis, identifont, whatthefont, etc., no joy. Searched probably all variants of "german sign nazi font typeface blockschrift schrift ww2 wwii", etc., anything and everything, also no joy IDing the font, but did find a picture or two of the font in question, the clearest image included here. Running out of ideas. :)