Nice post, new readers/ collectors should understand that it is possible to bring a gun back to nearly factory standard leaving all markings intact. It is very labor intensive but possible. Rare lugers are often the target of such restorations. Interesting though, almost always at least one short cut is done. I dont know if this is simply human nature or what but it happens often enough that it is something to understand and look for. Always look at a gun in it's entirety and dont focus on any particular aspect when buying rare guns.
My two cents worth and not worth much but put the two cents in your pocket, it will save you thousands
Vern