"All matching" doesn't mean "all original"

[Norme]

Originally Posted by A.Mifsin

But if one finds an original matching part for his Luger, the part is original, so, all matching and original.
Alf.

Alf raises an interesting philosophical point similar to the age-old question "If a tree falls in the forest and no one is present to hear it, does it make a sound?". Similarly, if a Luger has had a part replaced and no one can tell, is it original and matching? Regards, Norm