Today’s Monday Mystery Pic is a special one. This Campagnolo long cage rear dérailleur has been submitted by a reader who has not been able to identify the model – even after consulting with the folks at Oschner USA. Here’s the info so far:

“The design, gray pulleys and name etching leads one to think it is a late 80’s model, but is not from an OR group… If someone replies with models such as Rallye, Icarus, Centaur or Record OR…notta, none of them. Oschner has ruled them out…they really are stumped. The real issue is the hanger bushing and tab….a mystery…not the standard set up but apparently correctly installed as it rests against the stop and pin locater is correct. The derailleur may have been made for a specific bike sold in Europe.”

Readers, any help on this? Please reply in the ‘comment’ section. More pics after the break.

bikerumor monday mystery pic

bikerumor monday mystery pic



  1. my immediate guess before reading was Centuar or Record OR. Now I’m guessing it’s some kind of special make tandem or touring variation.

  2. Are there any pictures of the limit screws?

    I ask as I was taking a look at late 80s Euclid (, and they have traditional, on the outer plate of the parallelogram limit screws.

    I’m thinking a a little bit older, looking at the pulley cage spring (it looks, shall we say, primitive). The parallelogram spring also looks odd – I’ve never seen it done that way before, even in older derailleurs I’ve only seen the cross-corner linear spring rather than the rotational spring there. The parallelogram plates too seem to indicate that it’s older. In the link, even on the Euclid from 1989, the plates are smooth and rounded, whereas these ones are more boxy (albeit smooth – it’s Campy, after all).

    Good mystery here.

  3. There has been two mtb groups from Campa in 1988/89 named Centaur & Euclid. Have a look at Campys homepage, under company and then communication you’ll find the ads!

  4. Looks like an early proto for XX1 😉 Seriously though has the large offset on the top pulley and could be a near horizontal parallelogram linkage.

  5. Possibly one of Spence Wolfs’ modded derailleurs to work with touring freewheels – or a similar mod by someone else. Spence was doing most of his in th sixties, so this might be inspired by his work.

  6. Greetings…I am the person who submitted the derailleur for identification. I appreciate the information provided and yes, it has been confirmed to be a Campagnolo 3450 third generation Rallye. My thanks to you all, particularly Paul Smith for the links, Pedal Pedlar for its website and Sean for the link to the tandem mountain bike photo…

    Okay sports…now I will sell it as I have no desire to build and ride a mountain bike tandem, nor do I have a drop out designed for the derailleur. If anyone is interested in purchasing it, my email is:

    Cheers! kg

What do you think?