Bullet proof glass on a B-17G

[seesul]

Hello,

got a question- which gun turrets on a B-17G had a bullet prof glass?
Tail gunner only? Ball turret as well?
Thx.

 

[FLYBOYJ]

I know the ball turret did on the round window and if I remember correctly all the plexiglass on the turret was really thick and probably bullet proof (In actuality bullet resistant).

From photo of the B-17G tail, I don't think the windscreen was bullet proof. I think the very front of the Martin turret had some bullet glass.