My SBX cromoly frameset is newer than the list allows (early 90s) but it does indeed have a B in the downtube lug as it also have the word Bianchi around the BB shell, also has Bianchi on the brake bridges. Maybe on a raw frame they are hard to notice.
Walt
Falls Creek, Pa
> On the subject of the raw frames said to be Bianchis...they did have a B
> cut in to the top of the downtube lug. Is this significant or meaningless?
> Any other qualities a Bianchi should have to help one identify whether it
> is authentic? Seatpost diameter?
>
> Thanks
>
> Warren Young
> Toronto