Really similar to Decathlon Cobra 700 (Columbus Thron) minus the pointy seat lug. The RC Bianchis usually had B xxxxxxxx serials, not BI, and by this time they almost always had inner top tube cable at least, some even had inner RD cable in the chainstay.


EDIT: Cobra 700 ad on ebay, still no pointy seat lug, yet the same code as on subject https://www.ebay.ch/itm/334827361118