On May 21, 2007, at 9:06 PM, Jan Heine wrote:
> I have seen a 1960 Cinelli - the original owner appeared sure of
> the date, with no points on the lugs.
>
> When did the 74 mm BB shell appear and disappear? What if we put
> our collective info on Cinelli together here, and come up with the
> best possible dateline. I'll post it on the Bicycle Quarterly web
> site, unless Chuck would like to add it to the timelines on his
> site. (I think keeping the timelines together would be useful.)
>
> Dave, since you have looked into this, are you interested? (If you
> want to make it into a BQ article with photos, etc., that would be
> great, too.) As time goes by, this is only going to get fuzzier.
> Might be good to establish now what we know...
>
> Jan Heine
> Seattle, WA USA
Jan, I've asked the list in the past about the 74mm bottom bracket shell on Italian bikes and there was not much info offered. Maybe someone will will volunteer some new info this time around.
I've posted in the past about my August 1960 Cinelli SC with the 74mm bottom bracket shell and Campagnolo cottered bottom bracket with Cinelli (Magistroni) steel cranks with TA chainring adapter. Also my 1963 Masi Special with the 74mm bottom bracket shell and cotterless Campagnolo BB. The Masi BB shell has flanges. My '39 Bianchi racer, and my '50 Bianchi Folgorissima both have 74mm shells and both have flanges.
The Campagnolo BBs were introduced in 1958 in 68mm, 70mm and 74mm, both in cottered and cotterless axles. They first appear in the 1960 Catalog #14, and are in the '67 Catalog #15 and '68 Catalog #16... the 74mm axle is not included in the 1974 Catalog #17.
Anyone else have data???
Chuck Schmidt
South Pasadena, CA USA
http://www.velo-retro.com (reprints, t-shirts & timelines)