From the estate of a collector in Northern California, this piece is an outstanding example of a rare uniform item.  Most were thrown away after the war because they served NO useful purpose in civilian life.  This example features aluminum clips, and shows some considerable age in the form of fading.  You can see where the shade differences occur by pulling back the sewn-on internal features.  Fused to an M40 helmet with NO decals (I checked).  Helmet is original, but I have no way of telling whether it's original to the piece.  It's been there for decades, however, as rust staining on the interior of the cover and clip-abrasions on the helmet are present.