[Schupo]

I agree with Don that these are interesting markings showing a long period of use by the police. The "PB." markings (with a full stop after only the B) is the proper marking for the Police School at Bonn per the 1932 Prussian marking protocols. If it had a full stop after each letter it could indicate the Police School at Berlin per the 1922 Prussian marking protocols.

My eyes can't make out the other markings to see if they are Saxon or not. It would be interesting to know if this pistol was actually transferred from Saxon to Prussian ownership. We could better tell that if we knew if the pistol ever had a sear safety installed and then removed, as the VP armorers should have removed it if it were present, IMHO. We will have to wait for some more pictures.