I'd suggest some reading - just about any book on Lugers would be a good start.
DWM:
Deutsche Waffen und Munitionsfabriken is the primary weapons procurement entity for the German government from about 1996 - 1945. It changed names several times. You can google it pretty easily (Wikipedia).
Look for some books on Lugers - sometimes they come up for sale here and many are on Amazon, too.