Well...I looked at every German tail known, and nothing on this matches anything Luftwaffe.
So far no one has pointed out any features that prove it to be original...but lots of features it is fake.
One of the big give-aways is the 1/2 Swastika stencil and overlap...
Of course, one still has to eep an open mind.
If someone can make a list of the reasons why they think it is original, I am game
mike