Seen this at a few Aerojumbles before Col 😉 think its description started off as a B – 17 turret then morphed into a B . 17 Lincoln one after punters kept on being confused!

Good find though chap, glazing intact n all,

TT

Custodian of BP Type D tail turret!

P.P.S
If you need the contact i know a source for .50 barrel jackets – about £30 each when i last saw em

TT