I figure it to be manufactured in 1930 based on some of the posts I have seen. It also has an original walther banner magazine without serial number or caliber markings which holds 7 rounds. I have disassembled and reassembled the slide to clean it, and everything seems to be in order. It does not have a loaded chamber indicator at the hammer end of the slide.
The firing pin channel is covered by a metal plate of some kind.one I have not seen in any of the photos or videos of slide disassembly procedures. The bluing seems to be near perfect (I will try to post photos later tonight, but I'm at work now.). It has the C/N proof marks on the right side of the frame and slide, and at the business end of the barrel, but no other stampings or markings that I can find (slide is not etched inside and serial number is not stamped at the muzzle). I recently acquired a pre-war Walther PPK in 7.65mm (.32 ACP).