The wording of the article suggests it has never been played to an audience until this year. I suspect it was never built until now.

According to this interview:

http://www.youtube.com/watch?v=gOrn_z9m9lU

There were several old builds of the instrument, but they were all lost one way or another.

Thanks! A much better video since you can see partly how the instrument works. I like his decoration of the instrument, including the text and year in latin; I guess he is planning for this reconstruction to survive the centuries where the others didn't.