Barrel Marking on 1939 42 Luger

[JohnMo]

From some research on the forum, my Luger does not appear to be a Finnish because there is no SA stamp.



1.When and why would you think this barrel got installed? Did the Germany army rebarrel it?

2.What caliber is the barrel?

3. What does the +3 stamping on the front sight mean.

4. How do i properly measure barrel length on a Luger?


Thanks in Advance,


John