Hi Toni, In answer to your questions: "What's the reason for the two systems? Age ? Different models?" ... the answer is YES. Older sets from before and possibly during your bike's period typically had just a slotted screw, with the D-ring (what you described) as an upgrade option. We DO in fact know this,
indeed from Chuck's Timeline <http://www.velo-retro.com/tline.html>, as exc
erpted
here:
>
1952 - The Gran Sport Extra rear derailleur (second generation of Gran
Sport) is introduced (changed body, large chromed mounting bolt and pivot b
olt,
holes in pulleys, extended horn shape to the outside pulley cage frame and
revised cable clamp) along with the Sport single pulley rear derailleur. Th
e Gran
Sport down-tube shift levers are changed to single band clamp with flat-hea
d
screw friction adjusters, open cable without housing ("D" ring friction
adjuster screw as option). Fausto Coppi wins the 1952 Giro d'Italia and Tou
r de
France using Gran Sport derailleurs.
>
Here's a slotted screw on my 1955ish Torpado: <http://www.wooljersey.com/gallery/d/138017-2/Torp55GranSport52LtBlu06.jpg>.
At some point, the slotted screws were trickled down to lower models, and had a poorer finish to them.
Ciao, Mark Agree Southfield MI USA ~ ~ ~
Date: Sat, 1 Dec 2007 03:52:57 +0100 From: Toni Theilmeier <toni.theilmeier@t-online.de> To: classicrendezvous@bikelist.org Subject: [CR]Campag gear lever question
Hoping this isn´t too much of a daft question, here we go.
I´ve got two sorts of Campag gear levers in my box, they can be told
apart if one looks at the bolts holding the actual levers to the bands/braze on studs. One sort has a standard round slotted head, the other one has an oval wire protruding from the bolt head with the help
of which one can tension the friction disc.
What´s the reason for the two systems? Age? Different models?
Thanks for helping me once again, but I would like to get it right - this is the finishing touch for my 1957/58 Johnny Berry I think. I did
look in Chuck Schmidt´s timeline and elsewhere, to no avail.
Regards, Toni Theilmeier, Belm, Germany.
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