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@pip
What crankset is for? Older campy pista stuff needs a 109 mm bb and newer stuff is 111mm.
On my old bike, with a 70s Campy crank and the same spec as yours, I ran a BB stamped 68-P-120 (P indicates pista and 120 indicates the suggested width of the rear). You could probably get away with a 68-P-110 in there.
However, pretty much any symetric 111mm Campy BB will also work for either cranksets. It really won't make any difference with your chainline esp as most cogs tend to push the chain out to 43mm anyway.