[wlyon]

I agree with the above comments. I do not see where the barrel does not match? K dates are rather difficult to find and quite valuable. Probably the worst thing you could do is to take it to a local gunsmith. Lugers are a special weapon and value can be ruined very quickly . Give it a good cleaning and leave it alone is my best advise. A nice and valuable luger . Thanks for sharing.
Welcome to the forum. Bill