Welcome to the forums.The fact that it has been entirely rebuilt complicates matters. However, the Columbus decal is the pre-1988 style and the fact that it is not one of the celeste coloured Bianchi by Columbus or Bianchi Speciale decals, should make it pre-1985. There is no sign of the serial number on the seat lug, so that should place it circa 1984. The total lack of chrome, tretubi construction and Ferrari Red paint immediately had me leaning towards a 1984 Nuovo Racing but they typically had dropout eyelets. Once we have the serial number and narrow down the year, it should be easier to determine the model. Pic assist...