I have sitting before me an "Irvin" flying jascket. And it looks a "wrong 'un" to me.
There are NO vent eyelets under the arms. The back of the collar is stitched "crosswise" not zigzag, and there is no band over the collar seam.. The neck strap is an eyelet & buckle type, not double "D" rings and is the wrong way round (Strap where buckle should be). All zips are Aero. The half belt loops look too wide & are sewn on rather than sewn in. There are two on the right hand side and one on...
"Irvin" jacket. Is it ?

There are NO vent eyelets under the arms. The back of the collar is stitched "crosswise" not zigzag, and there is no band over the collar seam.. The neck strap is an eyelet & buckle type, not double "D" rings and is the wrong way round (Strap where buckle should be). All zips are Aero. The half belt loops look too wide & are sewn on rather than sewn in. There are two on the right hand side and one on...
"Irvin" jacket. Is it ?