I picked up this one recently.I believe this Jacket is pretty much un-issued that or it was worn very little.
I 've not seen to many of these around ( apart from ebay of course) so I am hoping it my be of interest on this forum.
To my knowledge these jackets were worn by chopper pilots. And were worn with specific Aircrew Trousers ( which I am on the look out for !!)
Here it is.........