[Ron Wood]

The W.D. 1567 designates a navy Luger from Werft Danzig, or the navy dockyard at Danzig, and the 1567 is the unit property number. The letters W.K. (Werft Kiel) and W.W. (Werft Wilhelmshaven) are most frequently encountered. Obviously the frame of your "mish mash" Luger was formerly from a navy weapon. Is there any indication that it may have had a grip safety that has been removed when it was married up with the other parts? Your observation about the notch in the barrel extension being an indication that it was from an artillery Luger is correct, although it may have been from a non-artillery Erfurt. Look on the right side of the receiver (barrel extension) and see if there are Erfurt proofs present. I have no idea what the 7017 on the frame indicates. Of course the 8735 on the front of the frame is the serial number of the frame and it may have a lower case script letter below the number. Your Luger may be a total mis-match but really interesting. It reads like a book!