Hello WadeN, go to here,
http://www.lugerforum.com/techinfo.html (and if you came through
www.lugerforum.com )it is on your left, there is a wealth of information on this site! The pictures show all the parts and then there is the search of the forum, (I can't seem to get the Old Search to work John? And where is that tutorial on the HK's

I'm such a funny guy, but I did pay my 2 cents for the year ya know)
Okay, added this, the magazine should have a # 2 (or a 1 or a 3), but NOT a II. Police Lugers were reworked many times and magazines numbered at that time by police arsenals, but I would say your magazine is incorrect no matter what? Is there other II's that collectors have seen?
Ed