Significance of Nitro Marking

[Lugerdoc]

Robert, I would not expect a C/N proofed barrel to be installed as part of a Weimar rework of your WW1 PO8. Most likely what you have is an East German replacement barrel. If this was done in the DDR, there will usually be importer marks somewhere on the pistol. The DDR C/N with be "thinner" than that used in the 1920 and before, and sometimes will have a date under it (eg. 953 for Sept 1953). TH