Not necessarily. Measure the spindle length, and the amount of spindle sticking out each cup (to determine whether it is asymmetrical or symmetrical). The older Campy NR/SR which this crankset appears to be a copy of used asymmetrical spindles. I assume yours is Italian thread, so it would have been about a 115mm spindle for Campy.
You might be able to find something like a Miche cartridge BB, which will be the proper ISO taper (instead of JIS, which Shimano and most Japanese manufacturers used).
But as was mentioned, I would take it apart and clean the cups and spindle and take a look at them first. It probably uses 11 1/4" balls per side in retainers, or more if loose. Grade 25 bearing balls are dirt cheap.
Last edited by Pars; 04-19-13 at 04:47 PM.