That was in '97. I think the serials (under BB) are sequential, tried to reach him from the website to ask, with no success. My number is in the 200s IIRC. Here is a more recent one, no 560. Indeed they are few and far between!

Edit: Gomano these are 3TTT bars/stem. But it now sports a Cinelli 1A w/ 64s actually! Also I recently asked Sr. Marinoni about Ryffranck (he paints his bikes), I think he's retired. And while I'm here here's a pic of the seat cluster.