New to lugers

[titus pullo]

I am mostly a rifle collector , my best friend ( is computer illiterate) has a 1916 luger that has all matching serial nos., even on the magazine, it says ER FU RT on it, has three imperial crowns and an eagle on it the serial no. is 96xx. it is in excelent condition and has a black leather holster that is also marked 1916. I thank you for any input provided.