I'm looking at a B&W negative from a press photographer in the early 60's. (I have the negative). If words found in the actual image are readable, the film rebate lettering, in this case, "Kodak safety film" is reversed. Would that mean that the film was loaded backward in the camera or?
I had a batch of Shanghai 8x10 with notches on both corners. I did load a bunch of them backwards both in the film holders and in the Jobo tank, but amazingly 1) the Jobo tank got developer to the back side to develop them properly, and 2) the film base is essentially clear so no under-exposure in the camera.
After inverting and flipping that edge, I see a ghost image of the edge printing.
That makes me suspect that this is a copy negative, prepared either using reversal processing or an inter-positive.