Identify flight jacket

[MGfan]

Someone has this listed as a LLBean A2 for sale. There isn’t a visible label to confirm this. Plus he has it listed as a large made in USA, not sure how he knows this without a tag. I thought the jackets with the one piece back were sized by actual chest size not s,m,l. Trying to decide if it’s worth buying.

 

[Proffset]

Without any tags and background info it's really hard to tell.