Bob,
If I recall correctly part of the discussion revolved around the lazy c/N on the left frame and receiver, those being places where Kreighoff stamped these marks. A recent discussion on Jan Still's Forum
http://www.gunboards.com/luger/topic.asp?TOPIC_ID=6370 involves a rework with those marks in those positions, clearly a Simson product (lots of e/6 involved).
Absent any more positive Krieghoff identifying markings--e.g., eagle/2 marked parts--it appears that the c/N alone are no longer sufficient to suggest a Krieghoff connection with htis gun.
--Dwight