The first Luger I ever owned, a 1914 DWM, had a chip broken off the toggle axle pin. I shot it a lot and never had a problem, however, you could tell from marks on the back of the receiver "ear" on that side that it had become stuck and caused the toggle to jamb open on at least one occasion. I believe this possibility is the reason for the Mauser "hump."
KFS
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