Vintage US Air Force - Army M-1951 Korean War Field Jacket OG 107, Hood M-1943. This Jacket was issued to a Korean Veteran in 1950 Or 1951. Yes he is still alive at 91.
The Hood is a M-1943. Yes they are two different greens.
Not sure why they were issued this way, maybe just using up what they had on hand at the time. Width in the middle 21.