What does "P.P.K." mean?

[Don M]

Ron, Matthias and Gerben,

Thank you very much for your responses. The maps I have been using are at http://www.gonschior.de/weimar/Deutschland/index.htm and are purported to be Weimar Era, circa 1925. I'd be very interested in your opinions of their accuracy. Regardless of province boundaries, the distance between K�¶ln and Burg seems rather far for the pistol to wander (but, of course, not impossible).