I bought a 1975 Raleigh Pro a few years ago and the bottom bracket had been replaced by the first owner. Still has the original Campy Strada crankset. I now want the same bb as the bike had originally . From my research, it would have been a Campagnolo Nuovo Record, English thread, for a double chain ring. I also read somewhere that the Campy's NR spindles changed length around 1977. I'm wondering if someone knows what was originally on mine. 111? 113? 115.5? And it was likely assymetrical, no?

Thanks.

Anyone?

East Hill

I think what you want should be marked 68-SS-120

That just means it's for a road bike with a 68mm BB shell and 120mm rear spacing.

I don't have any useful information for you either. I thought I had a link for you, but I can't find it.

115mm with +5 on the drive side comes to mind, but I don't remember if that's for pre CPSC.

The road spindle for a pre-78 68 mm BB was 112 mm, marked 68-SS-120. Sutherlands says that the Nuovo Record cups were thick, rifled, describing this as aluminum with steel insert I don't know about that -- I have a 1984 NR BB on my bike, and it's got thick, rifled cups that are all steel, I'm sure. For pre-78, thin cups were used for (old) Record, and Gran Sport.

It's on pages 3-29 ff. in Sutherlands, which you can download here:
https://icelord.net/bike/

If your cranks are d'un certain age, and have been installed and removed several times, they might benefit from a bit longer spindle, assuming that you want to have the center between chainrings on the 42.5 mm chainline. The later road spindle (like mine) is 114.5 mm, and I believe they added 1 mm to left, and 1.5 mm to right; but you could check that in Sutherlands too.

Thanks to all, especially Charles! This is great, very helpful. I do suspect, as you suggest, that the anachronistic longer spindle would be a better bet, because the 1975 cranks have been installed/removed/retightened quite a bit.