Hello Saxman,
Well...The sad news first

This 1920 Police ( or should I say Early Nazi Police Rework ) is not mine YET!

We are talking big $$$

but it's a complete rig...As my knowledge was limited on those specific models ( I mostly collect ERFURT & NAZI P-08's ) I asked the experts...I like to know what I'm buying....
The Ground off date: Look at the pistol from the front ( gotta point yourself in the face

) and examine the center portion of the chamber...if it is flat & lower than the sides: it was grounded off....The pistol I'm looking at is a ground off date...
Hope this helps a little...
kidvett