After the humiliating failure of their attempt to move into the market for mountain bike components, Campagnolo retreated back to their area of core competence - road racing components. But it was clear that there were not enough hard-core racing cyclists to sustain their business. It became time to try to attract the softer, plumper, older, richer, ex-racing cyclists who liked the racing look, enjoyed a nostalgia for long-lost youth, and fancied a bit of exercise - but who were never going to climb Alpe d'Huez with a 42 toothed inner chainwheel driving a 24 toothed bottom sprocket. And so the 'racing bike with a triple chainset' was born (God save anyone who called it a 'touring bike').
For the 1995 model year Campagnolo introduced the Campagnolo Racing T, with the 'T' standing for triple. It, mysteriously, managed to be part of the Record groupset, the Chorus groupset and the Athena groupset - that's economies of scale for you!
Just so that you knew it was a 'Racing Triple' the maximum sprocket size that it could handle was 28 teeth (later increased to 29). Even with a triple, those chubby lawyers and bank managers were going to have to do some hard work!
I am aware of 5 possible variants. A listing of them, with probable dates, might be:
After 2001, the 'Racing Triple' and 'Racing T' names disappeared and long pulley cage versions of Record and Chorus were introduced.
I believe that this example is an RD-09RA3, the third iteration of this basic design. I believe this because it has 'Racing Triple 9 Speed' written to the right of the 'Campagnolo' logo on its outer parallelogram plate. It also has 9-speed pulley wheels. Unsurprisingly this model was often called 'Campagnolo Racing Triple 9 Speed'.
A list of relevant details might include: