In my search for new information on Krupp shell case numbers I have a head stamp I have trouble understanding. Well, everything in this shell case is clear to me, except the "RR." in the head stamp.
I know "RR" where the first "R" is inverted and there is no dot, is for Romania.
But here there is a dot, indicating this may be an abbreviation. Any ideas what it indicates?
I know "RR" where the first "R" is inverted and there is no dot, is for Romania.
But here there is a dot, indicating this may be an abbreviation. Any ideas what it indicates?