LugerForum Discussion Forums - P 04 mag- Army marked or fake?

Many years ago, I picked up a P 04/16 dated 1917. On the outside it looked really good, all the right markings (the wider flange on the main toggle pin), but the bore looked completely corroded, with non-extant rifling (which explains how I could afford it). A few rounds through it and some bronze brush work with Hoppes overnight, and I was pleasantly surprised that it had a good and somewhat bright, if worn and oxidized, bore. The magazine is shown in attached pictures. The serial number matches the pistol SN but no proof marks, Navy or otherwise, and in a small Army font and style as shown. Of note is the "two-tone" finish that seems to be nickel-plated front half, but stainless steel-appearing rear half. No other markings. The quality of the mag is excellent, but my guts, once I educated myself on these details, tell me it's a fake. I have seen published photos of Army Pioneer troops with P 04s on late Navy buckled holsters on their belts (I have the book but don't want to violate copyright, so no photo attached). The wishful thinker in me wants to believe it's a real Army marked mag, but I have no evidence to support this. Input, opinion, guidance and speculation all welcome!