Which Campy derailleur?
 

My research says 2nd generation. Am I right? Educate me please.
https://cimg9.ibsrv.net/gimg/bikefor...05c5cc76b0.jpg
https://cimg2.ibsrv.net/gimg/bikefor...d368b66393.jpg
https://cimg6.ibsrv.net/gimg/bikefor...b395cf636f.jpg
https://cimg3.ibsrv.net/gimg/bikefor...2312fe99a2.jpg

The thread title was which campy derailleur do I have? But part of it didn't show up.

Looks like this one:

VeloBase.com - Component: Campagnolo 1052/1, Record (2nd version)

Not an expert, but I thought the second version had a slot on the cable stop. I would say first version 1052/1 Record, but maybe someone with more knowledge than me can corroborate or correct me.

Interesting, no slot in the pics, but the text says version 2 has the slot. Seems to contradict one another, unless I am missing something.

Version 1 would have the big slot-head screw retaining the main pivot.

This one isn't slotted, but doesn't have the screw, so is the real gen-2 mech.

What does the slot look like? Is it a slot cut in the bottom rather than the hole to feed the cable through?

In addition to the slot, I was also looking at the tall, curved piece that sits flush with the seat tube as support for the clamp. None of mine are that long.

https://i.imgur.com/2bP5B15.jpg

None of my others have the cable stop at the end, or any at all actually. I do think it's the 2nd version, according to the link to Velobase.
https://cimg1.ibsrv.net/gimg/bikefor...58d07100e4.jpg

@67SLT looks like you have a Nuovo Record 1052/1 mid 70's-77' (later body with cable stop) You could call this 2nd. gen .

VeloBase.com - Component: Campagnolo Record 1052/1 (later body with cable stop)

Or is it this one http://velobase.com/ViewComponent.as...=113&AbsPos=35

It looks closest to the link in #3 .

Second Generation without the slotted cable stop as far as I can see. @satbuilders link at
Campagnolo front changers is a good source.

I'm reviving this thread because I went to install this derailleur on an unknown English bike from the 50s, and discovered the clamp is too small. The bike has a standard 28.6 seat tube that had a Campy fd in use but I wanted to use this one because of the built in cable stop. Apparently this one has a 27.2 clamp. It was removed from a Puch built Sears Ted Williams Sport Racer from the 60s that has a smaller diameter seat tube. Were there different clamp size versions back then? I find it hard to believe Campy made a special size for Sears bikes.

The initial version, chromed upper arm, slotted screw retention of the arms. No cable slot cable entry from the descending extension. Fetch nice prices often on ebay.
Second version, no screw retention of the arms (mistake that caught up with Campagnolo later) retain the chromed bronze upper control arm, no slot.
Third, same with slot
3A - slot and alloy upper arm.
4th- the very common, the cable guide option essentially goes away. problematic upper pivot pin durability.
5th the "circlip" and forward extension of the body to provide more pin engagement.
6th the beginning of Super Record, 4 holes in cage
7th rework of Super Record, 3 holes in outer cage, CPSC lip arrives, Record, gets no holes as before, with the lip to protect us from ourselves.
8th, Super Record gets Black upper arm.
9th braze-on mount, fitted with stamped braze on bracket in box.

Somewhere after the 6th chromed adjustment screws and springs arrive.
"Pave" on clamp arm mutates over time. More machine like.

French seat tubes had 28.0 mm od and I could imagine Campagnolo making clamps for that size as a derailleur made for 28.6 tubing can be a little sloppy. But, 27.2 mm is real small, I think.

I don’t think so.
the Ted Williams bikes I have seen from Europe had ‘531’ now it may have only been that One Tube- I doubt Reynolds geared up the mandrels and dies to make that.

schwinn did get Huret to make up front derailleur for the Varsity and Continental but those were big volumes.

Campagnolo had a known issue if closing up on French metric 28.0 tubing.
why do you think so many upper tier French frames had a brazed on stop for the down tube shifters?

That's definitely an older gen Record.

27.2 is a normal clamp size for NR / SR front changers at least by 1974. That's what I have. I think there were 3 different tube sizes over the years.

I got the clamp to fit. It was really tight, but it opened up enough to close around the tube snug.

Get that clamp a proper 5mm bolt and nut.

I don't think so. I am not aware of any 27.2 OD seat tube. 28.6 (Imperial) and 28.0 (Metric) were the standard OD for Reynolds 531. Columbus only made 28.6 OD (for SL/SP).

27.2 is standard ID size for Imperial seat tubes, with 27.0, various 26.x and 25.x sizes for sleeved seat tubes and thicker wall tubing.

The od of the seat tube of the Sears bike I removed it from is 28.07, and it fit well on that bike. The od of the British bike I put it on is 28.6. The Id of the fd clamp is 27.2. I forced it on and it spread open enough. It scratched the new paint though. I'll have to touch it up.
I do need to replace the nut and bolt with a proper one, and install the new cable and it will be done.
https://cimg4.ibsrv.net/gimg/bikefor...684f9c86e5.jpg

What's the bike?

It's an unknown make British bike from the 40s or 50s. Nobody has been able to identify yet. BF member @jjhabbs made a video of it here. https://cimg3.ibsrv.net/gimg/bikefor...322f955dd3.jpg

Nice! That looks like a great build.