Prst-1
I was lucky enough to be asked to test ride one of these in 1997 (pre sale launch) for a week or two, so could be earlier than 2004. Marin UK asked me, who were seeing to the distribution, then I had to submit a report and interview. It was surprisingly light, but had a nasty habit of diving over undulations and tipping me off over the bars. Other than that, they were a really fast comfy ride.