Jasta,
My 1914 DWM Artillery luger is matching except for the side plate, as far as I'm concerned, it is certainly collectible! A "matching example" sells for $6k to $10k, so this one must be worth a little more than a $1200 shooter artillery; I surely hope so! JMHO.
I have a one part mismatched 1906 Navy also, bought from a Navy guy here; it must be worth more than a shooter, but less than a "full match"- cause I paid somewhere in between for it!
A mismatched part does not "automatically" make a luger a shooter(unless you want it to),
again JMHO.