[HerrKaiser]

Based on what is seen in the pictures. It is indeed a DWM 1917 military pistol then pressed into police service after WW1, but without a 1920 property stamp. You have what is widely considered to be the best magazine for it-a Schmeisser-Heanel-with a police-style numbering indicating it was the primary magazine for police service of the gun as the serial is matched to it as well. Looks to be reblued or the strawing is almost gone on all parts that are visible (takedown lever and trigger most obviously should be a golden color or more of a bare steel color instead of blued like the rest of the gun as the pictures seem to show, it could also look that way in photos from bad lighting). It should be a fantastic shooter piece if that is the case as the reblue kills collectible value for it.

Welcome to the forum and read the FAQ, accessible at the top of every page. It has tons of good info. It can also show you some of the other picture angles you’ll want to post for better evaluation of it.