Another '42 8x57 model 22 here. I have the stripper clip guide
Mine says:
Waffenwerke Brunn
Aktiengesellschaft
on the side instead of the AG abbreviation on a single line. It has the oval gas ports and the guide rib. My bolt is blued but worn. Overall, not in near as nice of condition as yours but I'm glad to have it. Also, strangely, no forend checkering and it doesn't appear to be refinished. I'll see if I can pull the action from the stock this weekend and see what it says.