I have a brand new 2004 Bianchi Pista Concept frame/fork. This thing is brand, brand new. I watched the guy at RA Cycles cut open the original shipping box from Bianchi and pull it out. It still had tape, cardboard, and padding on it for shipping.
So, last night I get my Shimano Dura Ace 7710 BB and place it on the shell of the bike to see if it fits, and the BB slides (not screws) right on... a bit loosely as though it were of a slighly smaller diameter than the shell.
Shimano Dura Ace 7710 BB = 68mm English
Bianchi Pista Concept BB Shell = 68mm English
Am I missing something?
edit: (scroll down for pics)