Both Erfurt & Simson have Proofed marked ejectors, at least on the pistols I have seen...
As for How it happened to that poor ejector:
It was on the reassembly, I did slide it in ( front was probably binding on the slot ) pushed it in to clip it's back then: PIK !!
There I was with a 2 part Ejector...
MARK <img border="0" title="" alt="[Wink]" src="wink.gif" />