Your pistol was manufactured in 1944. It is a rare police pistol, being made that close to war's end. It should have black grips with the magazine having the Walther banner & 7.65mm under that. It should also have a small w stamped on the spline of the mag.
If you have the holster and two numbered mags I could see well over 2500 or more in good condition. Hope this helps ya?