Glenn,
That last one looks more like a "b" to me. I'm sure you mean
cursive, not Gothic. Cursive = running, as in running together, as we learned around 3rd or 4th grade to write, not print. Gothic, or Blackletter script is the old style of German font.
http://en.wikipedia.org/wiki/Blackletter
My notion is that the internal stampings like these are all over the board as far as font/characters and locations. I've read here that there's no particular documentation of what means what, since they are ersatz indicators of steps in the machining and assembly process applied by individual workers or sub-inspectors?