Here is a fuzzy(ish) picture of the inside of a Porta Catena dropout:
http://i14.tinypic.com/
Doug Van Cleve Chandler, AZ USA
On 12/9/07, Kenneth Freeman <ken4bikes@att.net> wrote:
> Not to hijack the thread, but does anyone have a picture of the dropout
> drilling? My early '80s or so Mondonico has 1010 dropouts with one small
> (too small for fender bolts) hole in the drive side part. I've always
> wondered it this for a Porta Catena.
>
> This thread constrains the date of my Mondo to not earlier than 1978, so
> thanks!
>
> Ken Freeman
> Ann Arbor, MI USA
>
> -----Original Message-----
> From: classicrendezvous-bounces@bikelist.org
> [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of John Betmanis
> Sent: Saturday, December 08, 2007 6:13 PM
> To: Classic Rendezvous
> Subject: Re: [CR]Campy Porta Catena (sp?) dropout useful for dating frame?
>
> At 03:00 PM 08/12/2007 -0700, Doug Van Cleve wrote:
>
> >Does the presence of a right dropout with the threaded holes for the
> >Porta Catena device narrow down the range of when a frame was most
> >likely made?
>
> All depends how large a stock of dropouts the builder kept on hand and how
> stock was rotated. The right dropout on my '82 Nishiki Ultimate is threaded.
> According to the timeline, this feature appeared in 1978, but I don't know
> how long it lasted.
>
> John Betmanis
> Woodstock, Ontario
> Canada