1918 Mauser Luger info

[Szyp]

Hello. I have just fulfilled a lifelong dream and purchased my first Luger, at my age of 66. I have spent my professional career as a history teacher and professor, and am extremely interested in the 2 World Wars partly because my family immigrated to America in between the wars. Part of the fun is imagining where this particular Luger may have been, who might have used it, and such. Anyone who can offer any insight, links, or info is much appreciated. The serial number is 5343f, and it is a Mauser, year 1920, with the last 2 serial numbers stamped on the small parts, The 7 round magazine has an aluminum base, and is not matching. I think the serial numbers on the small parts indicate it would have been military issue; if so this would have been issued during the immediate post World War1 period, during the Weimar Period, when Germany was limited to a 100,000 man Army. It is in exceptional condition for it's age, so I am hoping maybe someone of some historical significance might be connected with this pistol. Any help or suggestions, or personal insight will be much appreciated as I begin this fascinating hobby. I can be reached at wszypszak@comcast.net.