Believe it or not Thor, the website where this photo is displayed purports that this photos shows some members of the Bavarian Police in 1944...
You can see the origin URL of the photo as a watermark:
www.photosammler.de
Notice that they are ALL carrying Lugers. Perhaps one of them is the pistol now in your possession!
Also notice the variety of the holsters in use...
sehr interessant - nicht wahr?
http://boards.rennlist.com/upload/pol44.jpg