4) Frame has a decal stating Bianchi Special Cromo Molibeno Produzione Columbus
what color is the tubing decal?
decal color is celeste, matches the bike.
5) The Biachi name is part of the frame, not stickers; it is raised
where is Bianchi raised on the frame?
both tubes, and engraved on the fork crown.
6) It has the "circle B" on by the seat post.
this is on the top of the seat stay?
Yes, on top of the seat stay.
sounds like it may be a Squadra or Trefeo