RAD was Reich Labor Service.
“an eagle, wings spread carrying a swastika in its talons”=Probably an exercise shirt from the Luftwaffe (Air Force). It could be a “kid’s size”. Most of the those manning the 88 anti-aircraft batteries were Luftwaffe and kids around 12-15.
“Most of the those manning the 88 anti-aircraft batteries were Luftwaffe and kids around 12-15.”
My wife’s great uncle was drafted late in the war when in his 60’s...and he manned 88’s in Berlin.