Originally Posted by
operator
Sure.
But removing the left side is sufficient to measure the shell diameter, which tells you what the right side is.
Operator, You and I are on the same page here. It's exactly what I said early on in this thread, (reproduced below).
Many Italian bikes are supplied with English BBs.
Meaning the right cup is
LH thread. The safe way is to remove the left cup first since they're
always RH thread, and use that to determine whether the BB is Italian or English, which will tell you which way the right cup will be threaded.
If you have a caliper, Italian cups are 36mm across the thread crests, while English are slightly smaller than 35mm.