There is a mark that looks like the WaffenAmt stamp but it is difficult to see what it is in its current state.
Today I did the detail strip. This is not the hardest gun I have ever field stripped (actually it was fairly uneventful). Took maybe a half an hour with the help of a book that gave some tips.
First, got the grips off. Very cool mechanism inside.
Got the skeleton sorted. All the parts in multiple bags to keep them together with other parts of their operating group.
Very interesting milling as well
Also got a decent(ish) picture of the bore. This is the best I could grab. There are a surprising amount of grooves in the rifling. They look to be in pretty decent condition.
Now for the bad news. The firing pin is a very smart two piece system. Unfortunately, the front firing pin is very small and it appears to be damaged. It seems slightly bent and slightly deformed. Don't know the past history of it. I will hope it works and keep an eye on a source for a new one if not.