The matching ser marked on the right side of the slide was generally with-out the suffix. Walther Serial Number Lookup Some PP's have a second serial number on the right side of the slide, forward of the ejection port. If you have any trouble locating the serial number for any reason, you can bring the gun into your local gun shop for help.
Your serial number with the ac Walther mfg code falls in the late war, production period. The approximate range of serial numbers for Walther PP's produced during the war are P to xxP. The serial number parallel to the grip on the right hand side is I believe. Anyway I cannot find any date codes or anything on the gun. The Mahurin factory as you probably already know. I have a Walther PP 32acp made in France. Walther factory markings were generally found on the left side of the slide. Additionally some pistols were shipped with two magazines serial numbered to the gun. Some PP's have a second serial number on the right side of the slide, forward of the ejection port.