help identifying my new luger

[tblazerss]

Hi everybody,
I'm new to the luger thing but am very interested in the history around these handguns. I've just purchased a luger that I'm having alot of trouble identifying. It's a dwm serial #9118 with a g code and one that one the identifications had a ? mark for information. All but two numbers match to the whole pistol, it the shoulder stock tangs made in the drip, dark brown plastic grips, very good straw color on a parts that are supposed to be and has been refinished at some time in its life. It has a aluminum mag with different #'s. I would like to get a idea of what I've just gotten. I paid $750 for it off of gunbroker but was located in my home town. I'm looking to further my collection(have been doing the colt thing) wanted my first to be a shooter but want my next to be alittle more to the collector grade side so any suggestions in that area would be nice also. I've kinda been thinking of one in nazi area so tell me what you guys think.
Thanks Billy