Hi,
Thank you all for your replies. Yes, the C/N proofs placement is such that it really looks that this pistol has been reworked by the Krieghoff factory.
Here is the proof mark found on the breechlock:
http://forums.lugerforum.com/lfuploa...breechlock.jpg
However did HK make Luger reworks without adding their own eagle-proof markings or any other HK mark?