Originally Posted by
operator
Christs sake, why doesn't the OP just measure the shell width so we can end this debate with 95% certainty?
I think we're well past that and by now he's probably removed the cup and replaced the BB. However, if he hasn't there's a catch 22. Both Italian threaded and BSC BB shells from the same maker have the same exterior dimensions, so you can't just measure the shell unless you measure it from the inside by which time you already know.