Luger ID

I'm trying to find out what year/model a 9mm luger with a 4" barrel was manufactured. The serial no. is three digit and is stamped on the bottom of the barrel and front of the receiver. There is a crown with an N under it stamped horizontal on the toggle and the top of the toggle is marked with a DWM.There is an vertical crown has an N under it stamped on the left side of the receiver. The last two digits of the serial appears on most of the other pieces except the magazine which is stamped P-08. The safety has "GESICHERT" and the word German is not on the gun.There is additional what looks like a circle with two little tales opposite one an other located under the serial no.of the receiver. The gun appears to have never been fired and the blue 95%. Any information you can provide would be helpful.Thank you