First the Bad News, then the Good news: From what I can tell, ALL parts on this bike appear to be NON-Original except for the SR HS. As others have said, this is a repaint, why the unfortunate mix of salmon on Celeste, I dunno. More bad news, the repaint has covered a lot of original chrome. The frame is most likely one of two very high Bianchi Specialissima Team bike models from 1984 or 1985.
Notice the rear brake bridge: Only came on 83, 84 Specialissima X-3s, and or 1985 Mondiale and Specialissima X-4 (first generation). Notice fork crown, (Cinelli model) only came on 83, 84, 85, 86 high end models such as X-3, Mondiale, Centenario, X-4. I thought it could also be a 1985 repainted Argentine replica, but the head-tube has a decal not engraved ensignia into the head-tube. In any case, this bike came with complete Campy SR, most likely fully pantographed.
Here's the confooosing part: single chromed chain stay sez 83, 84 X-3. Pump Peg on head-tube sez 1985Mondiale or X-4. On the other hand, maybe both rear chain stays were chromed prior to repaint which would make it 85 model for sure.
With all that said, this is most definately a reparto course racing frame of which very few were made. If I had to put money on this I would say that this was an European marketed bike that most likely was a late 1984 model Specialissima X-3, where they started putting the pump peg on the head-tube.
Thats my story and I am sticking to it.
P.S. I own 2 1982 Tipo-Corsas, 3 (I think) 1982 Specialissima Superleggeras, 2 1983 Specialissima X-3s (I think am the only one who has 2 of these), 1 1985 Specialiisam X-4, and about 3 1985 and 1986 Mondiales. And no, they are not all ridable. peace.