Here's the back of a RO's seat. Notice the reinforced slots for the cushion hooks, reinforced base, and lack of those horizontal attachment strips. I'm far, far, from an expert, but every RO seat I've looked at looks like this. All the B-17 Flight deck seats I've seen have the attachment strips and there is no reinforcing of the hook slots or base. As Mr. Freer points out, the base attachment points are also different. There could be other differences as well.
All that said, I'm hoping not to be led in this direction as I was asking about the stenciling on the seat, and whether there's a way to tell if this is the left or right seat. Based on where the stenciling is, I'd bet against there having been an "A.A.F". Looks more like just an "A.F." followed by illegible stenciling.
Thanks very much