Asking this question because I have seen a few very late 1930 (s/n > 910,000) having muzzle like this..... originally, what in my mind was "did relining in German language also start with 'R' ? as part of 'R/W' appearing on the barrel?" or "Rework?", but wait a minute, that's in English, not in German...
So, German relining has nothing to do with "R". That guess was wrong.....
The first gun that I saw this type of muzzle was a very late 1930 claimed being found on U-505 (captured by U.S. Navy in 1944, but no official document to proof the gun s/n 912184 was related with that boat. For God reason, more and more I felt that story was actually true, but it's not mine). Later on, I saw couple of more. This is one of them. When things concentrated on unusual places in certain serial range from independent sources, there could be some previously untold histories on this thing.....
Let me know what you think, thanks.
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