My eyes are not the best, and fraktur letters are weird to begin with...But I did find a site with fraktur fonts, which I could load into my font library and print out to match up with any fraktur letters I find on Lugers or whatever...
...Except that there seem to be a *lot* of fraktur fonts...
http://www.morscher.com/3r/fonts/fraktur.htm
Which one of these fonts most closely resembles the Luger lettering???