Greatly appreciate all of the knowledgeable and professional input on the matter, I am glad to have sought out subject matter experts on the topic. Definitely a nifty piece to look at and actually hold, even though the condition is definitely not the greatest. I guess that added a slight historical context to its appearance, that one can only imagine the story behind its origin, use, and the previous owners. As this is literally the third Luger I've seen. The other two being at the only two gun shows I ever attended. Aside from that, my limited knowledge only extends as far as what I've read and generalized to apply i.e. meticulous production with matching serial numbers on every part and accessory.
Once again, much thanks to all!
