For sale is a rare  1st generation 1987 Campagnolo Chorus Groupset . All items are fully working, all original parts  and in excellent condition as can be seen from the photos.

The rear derailleur in particular  is special in that it can take up to a 30t cassette which was extremely rare for the time.  See more details here https://campagnolodelta.blogspot.com/2011/01/1988-campagnolo-chorus-rear-derailleur.html?m=1

Any question please ask