Dang- I was afraid someone would ask what "Very Early" meant! I can't answer that, but I can paint a picture for everyone, and maybe that will help in dating it.
I have a NOS Campy Record road crankset that is 151 mm BCD, and comes in a box with a yellow flip-open cover with a blue line drawing of a Campy crankset, and the bottom part of the box is blue.
The crank says, "Campagnolo 9/16" x 20F." around the pedal hole. It is a 49T/52T. The bottom bracket that comes with it has a spindle that says, "68-SS-120 Con Sfere Da 3/16" and the cups are BSC and say the say the same thing w/regard to the balls. The spindle has pressed on races that include a squared shoulder inboard from the bearing surface.
The paper Campy tape that secured the box closed originally has the old-looking wheel/wing/QR logo.
So, what date is this?
John Barron Minneapolis http://www.velostuf.com
Harvey M Sachs wrote:
> I'm not sure what John means by "very early". I'm pretty sure that the
> 3/16" on road bbs didn't start till about '63, but don't know how long it
> lasted. Please help if I'm wrong on this.
>
> harvey sachs
>
> <snip>
> >The very early Campy Record track and road BB's used 3/16" ball
> >bearings, and the BB cups as well as the spindle was marked as such.
> >They are pretty tough to find nowadays.
> >
> >I do have some Campy BSC pista spindles NOS for sale...
> >
> >John Barron
> >Minneapolis
> >http://www.velostuf.com
> >
> >From: Ray Stedronsky <ray@dcn.davis.ca.us>
> >To: Classicrendezvous <Classicrendezvous@bikelist.org>
> >Subject: [Classicrendezvous] Campagnolo Pista BB question
> >
> >
> >Good Evening,
> >
> >Sure is nice to have the list back up and running.....THANKS Dale !
> >
> >I'd like to appeal to the groups collective experience about a bottom
> >bracket question.
> >
> >I was rummaging about in my friends parts bin today looking for a
> >replacement Campagnolo Pista BB spindle to replace the one that's just
> >about
> >worn out on my Hetchins fixie. I came across one that read "con sphere
> >da
> >3/16". I know that it needs 3/16 balls but the question is (finally)
> >will
> >the corresponding cups also be marked with 3/16? If so, has anyone ever
> >
> >seen these for sale anywhere?
> >
> >I'll probably have better luck hunting down a "normal" 1/4 in. 68 - P -
> >120
> >spindle but I though it would be rather fun to have a BB that's a bit
> >different.
> >
> >Thanks for the help,
> >
> >Ray Stedronsky
> >Davis, California