Jan Still remarks in his Imperial Lugers that about 20-25% of Lugers are unit marked. I have wondered about all the others that were NOT unit marked. Were many of these just overlooked or were these sidearms used in rear units? Does anyone have an idea if this was randomly done? In Jeff Noll's revised edition, the tabulation of unit marked P.08's seems to hold that rough relatively low percentage through the entire war years. Does anyone have ideas about this?