Hello, I have the serial number around 3 mistery cars:
http://www.bugattibuilder.com/wiki/inde ... -633_CW_06
is the chassis: 2604, owner Mr.Bergami, present at "Bugatti in Umbria" 8-14 June 2008. Now with italian immatriculation plates: DN 322 JT.
and:
http://www.bugattibuilder.com/wiki/inde ... wn-AB_9815
was present at Bugatti International Meeting 2002 in Italy (not 2003 !) with his owner Francesco Guasti, with name: T 22 Vinet (why Vinet ?) and his s/n is: 587
at last;
http://www.bugattibuilder.com/wiki/inde ... nown-C_101
present Bugatti International Meeting 2002 with Arild Staver and Turid Dannerig from Norway. Is a T13 s/n 2058.
Bye.

Thank you bellabarbas for these precise details, I updated wiki.

Have lists it to you of all the participants in Bugatti in Umbria.