Not what I usually look for but I could not resist. The guy I bought it from bought it at the Army Rod & gun club in Germany. .......
Is only the bbl of the pistol ser#'d and no factory # on the Frame?
I bought a NIB postwar P38 that was numbered like that.
The LockingBolt was #'d as well as an internal part.
It was brought into the USA by a US Diplomat and had all the State Dept(?) paperwork with it clearing it .
As I understand it, the Bbl is the control part on the firearm in most Euro countrys as the Frame is in the USA.
I ran into that when engraving parts on some long-guns that went to Italy and back to the USA. The frames and parts went w/o issue/problems.
The bbl's for same got heavy duty paperwork and delay's as a 'firearm' going to Europe. So much so at one point that it was decided to do those bbls here instead of shipping them back and forth.More work for me.
So the lack of a factory ser# on the frame of the pistol was not something malicious. But rather a gun not made for export. That's what I was informed anyway.
It made for some strange looks from potential buyers when I went to resell it. But collectors of same seemed to know the story and the paperwork helped of course.
Maybe nothing to do with the OP's pistol, but the fine looking P38 jogged my memory.
No export markings of course nor x-PD or Govt ownership markings.