There's a photo in this discussion on Jan's website showing a 1918 Erfurt with chips missing from the front of the breechblock on either side of the extractor slot:
http://www.gunboards.com/luger/topic.asp?TOPIC_ID=3698
I have seen a 1918 DWM with a similar chip missing. It has been speculated that this was the result of firing hotter ammo than the gun was designed for, perhaps machine gun ammo.
Does anyone have any additional information about this type of damage? Is it common? Was it likely to have occurred while in use by the police or military and not repaired? Was 1918 a bad year for breechblocks
?