The sewing is all over the place, and was done by a very inexperienced hand; the application of the edge seam is really atrocious.
Also, the fact that the seam at the front is off-centre is really not in line with German design or quality. The sweatband appears to be from a visor cap, as it runs straight rather than curved, as demonstrated by all the folds, particularly at the front. The ageing also doesn't ring true for me. I think the body is fake with some original parts...