Re: Marking of the 2nd Bomb Group Forts
 

Hi Roman. This shows at least that the photo WAS colourised and not an original. Still looking. I havn't got Bob's book but I think he says blue.
Nick
( there is another colourised 2BG B-17G further down the page--very nice though).

https://www.instazu.com/tag/15thairforce