My 83 Trek came with that BB. As per another poster my research showed it was closer to the campy taper. I was tempted to change out the spindle and bearings but it operated SO smooth. The spindle if I recall was silver and marked 68 or 68W. It screamed quality so I kept it and glad I did..
My Superbe brakes had severe toe in on just one set and only on one side. I read here about bending the arms and gave it a light try and it seemed like a poor idea with those. In the end, I took one brake pad to the belt sander to get a better angle. Poor braking performance on my bike with the original pads, but flatlands here so keeping those cool Superbe holders..