Hello,
I have a Bianchi with 8M and 9014 on the bottom bracket which also has a screw on the brake bridge. The tubing sticker says its triple butted formula two Columbus tubing if that helps. The bike also has a black stem and a red square near the Bianchi decals.
The owner couldn't tell me much about the bike other than the fact that some components had been replaced. I don't believe it came with a Shimano 600 groupset but I could be wrong.
I'm having a very hard time finding the model of this bike so help would be appreciated!
Edit: here are some photos.
