According to http://www.velo-retro.com/
>
>
> Hi,
>
> I just received a campy rally rear as part of a package of
> parts I bought. I'd like to be able to place this der. within
> a time frame. The der. looks like the one in this picture:
>
> http://www.campyonly.com/
>
> (NB: this is not the one I own, it's just the only image
> I could find)
>
> The part that says campagnolo on it in the picture looks
> sort of like it's alloy but the one I have is chrome plated.
> There are some minor pits and flaking on that part. The one
> in the picture also looks to have a sort of plate that covers
> the spot where the cable housing joins the der. but mine looks
> slightly different. Could be the angle of the camera though.
>
> I did a search of the archives but saw mostly postings
> about NR rears with long cages. What was the time frame
> that these rear der. were made and how might I be able
> to put a date or time frame to mine?
>
> thanks,
> rob hawks
> richmond, ca