Collectors pay a lot for all-matching Lugers. The key element is ALL. Nearly all-matching doesn't count when it comes to serious money. As a result, the quantity of faked numbers on Luger parts is probably enormous!
In this kind of situation, the first rule is: if you are not an expert, have it looked at by someone who is. I was at a BDMP handgun competition yesterday (well, someone has to come last!) and talked to a Luger fan who had an all-matching Luger with a rare source marking. Well, not quite all matching, one piece inside was non-matching. A collector, who examined the gun in his presence, pointed this out and said he would give over 3000 euros for a perfect example, but with one non-matching internal part he was not interested.
Patrick is quite right* - it is perfectly matched, or it is a shooter. Nothing else matters much.
*Patricks are always right, OK?