...and a strange B-3 as well

[Hawkeye]

Has a square, flapped pocket and extra seams on the lower arms.

http://cgi.ebay.co.uk/B3-jacket-Flight- ... dZViewItem

 

[Roughwear]

Very strange jacket indeed. Sort of D1-B3 cross. Could be a put together job by ground crew or a private purchase. I have never seen one quite like this before. :?

 

[Peter Graham]

Not a bad looking jacket. I'd say it's a put together. The seam tapes seem wider than normal for an issued jacket.