He lost his right arm serving on the Eastern front in 1941. I think the person on the left is a foriegn official or diplomat, the uniform does not really look German to me.
Edit, these are the units he served in on the Eastern Front.
from sept 1939 enlisted in IR 272
- released from WH on 1.5.40
- june 41 re enlisted in Ers bat of IR 9 then soon next to IR 8