Ok, I just thought he was Wachtmeister already in 1943 where the first 3 pictures if from, but the document saying he is Wachtmeister is written in mid 1944 and the last 2 pictures is from july 1944 and january 1945.
I asked yesterday about the feldpost number in this thread and it looks like the unit have been many places, do you think his unit have been building new air force Battery light anti-aircraft departments, or just moved the batteries to where it was needed?