1915 DWM questions....

[tubsee]

I was fortunate to pick up a 1915 DWM Luger this weekend. Sort of an impulse purchase as the previous owner could not offer many details until I was at his home. Now that it is mine I an trying to educate myself on this Luger. I think I have a Luger that may have been picked us by the British. The has the words "NOT ENGLISH MAKE' stamped on the gun. I welcome any comments or feedback. Does this help or hurt the value? The metal parts are all matching. The magazine appears the correct style but the numbers on the bottom have been worn off completely. I do not think the grips are original. Thanks in advance.