I'm not saying it's a replica because I don't believe it is a replica, but how can you tell to a certainty, based solely on that photograph, that that is a real, functioning Walther PPK? Like I said, I believe it probably is, based on the evidence so far...but that photo alone doesn't prove that IMO
http://www.airsoft-project.com/review/walther-ppk-maruzen.html
Well it doesn't appear to be a Maruzen replica, which pretends to be the made in Germany version and uses the term "Licenced Trademark of" and is made of plastic so doesn't show patina on the bluing.
The "Black Metal" replica version isn't blued and isn't marked "Under Licence of". It doesn't look like the one in DM's picture.