The new millenum saw Campagnolo launch a completely new design of Record derailleur - the Record (RD00-210). For the first time in perhaps 25 years, Campagnolo were really going for it. The Record (RD00-210) set Campagnolo on a new path - with lightweight as a serious goal and the use of carbon fibre as a key tool for achieving that goal. As well as using carbon fibre, it introduced a number of other features - such as the idiosyncratic chain tension adjusting system - that remain with us to this day.
As ever with Campagnolo, the next 8 years saw a number of additions and refinements - surely primarily designed to keep future deraileur collectors on their toes. But all of the variants had titanium b-pivot and p-pivot bolts, titanium cable clamp bolts, hollow titanium pulley bolts (yes, really!) and carbon outer parallelogram plates. Serious stuff.
A list of possible variants, with probable dates, might include:
I believe this example is a Record (RD01-RE209), sometimes known as the 'Record Carbon 9 Speed'. It is a bit of an anachronism as it was a 9-speed derailleur launched after, rather than before, the, extremely similar, Record (RD00-210) 10 speed model. Perhaps Campagnolo needed to shift a surfeit of 9-speed cassettes or, worse still, of 9-speed Ergopower levers.