this is one of 20 B-17Cs (a.k.a. Fortress I) of RAF 90 Squadron, 3 of which participated in the 1st B-17 raid of WWII (1st ever?) to Wilhelmshaven on July 8th 1941.
bottom 3 are B-17G, top one is B-17C...dont know where Fortress I got the name - seems to be missing quite a few guns (@ least 6), but it did have those nice blisters for the side gunners, like the Privateer (unlike privateer it was a single gun)
