Campagnolo is a component company, not a bicycle manufacturer. As well, bicycles can have been built up from a bare frame using parts chosen by the original owner. You have to look on a case by case basis. For example, I own a 2007 Look 595 which I built up myself using Campagnolo Record and Chorus components and a set of Campagnolo Shamal wheels. It is possible that no other Look 595 with the same component mix exists anywhere. This could easily be the same case for any 20+ year old bike which could easily have had components replaced or upgraded over the years. My Look has had the crankset replaced twice along with the chain, tires, and various cassettes