if you can find a serial number, you could email the company which now owns the rossin name. no website as of now, but a quick interweb search led to this:
hello to everybody.
all of you are right about Rossin brand. it has been purchased in 1992 from another Italian bicycle's group (REGINA Cycles). nevertheless all the quality features and passion has been keept unchanged during this period. recently the whole activities of Regina Cycles has been purchased from a new Italian bicycles' manufacturer called Gruppo Bici srl (Bicycle's Group co., ltd). now Gruppo Bici srl (managed from innovative peoples) undertake to refresh the famous Rossin brand and sell the Italian HANDMADE road racing frames in worldwide market.
you can trust in my word, I'm the Gruppo Bici's CEO. for any further clarifications and/or any extra mktg or tech infos feel free to contact me at any time at:
andrea@gruppobici.it
sporting regards to everybody,
cheers,
Andrea Chiarini | Gruppo Bici srl
Rossin dept - Italy
andrea@gruppobici.it