I would also add that the absense of the 1920 property mark might be due to the fact that this pistol was actively being used in combat against the Poles on the Eastern Frontier around Breslau. And could not be returned to be property marked.

Infanterief�hrer III: Potsdam
7. Infanterieregiment: Schweidnitz (Stab, 13. Kp. Ausbildungs-Btl)
Oppeln I. Btl (2 Kp in Neisse)
Hirschberg II. Btl (2 Kp in Glatz)
Breslau III. Btl