Ogiginal vs re-blue

[Norme]

Hi lrb,
Well, you won't find halos on a salt blued Luger but there are two indicators you could look for, but you need to field strip the gun. They are:
1/ The L shaped link inside the side-plate should be "in the white" (unblued). This is a very difficult part to remove and even harder to replace, most refinishers don't bother.
2/ The same applies to the S shaped rear connector link that dangles below the rear toggle.
Regards, Norm