Yes!Did you find a frame number on it? Might help with the date and manufacturer. Certainly be useful for my records.
Frame number could be B10129 or BI 0129 as you say. Either way, its not the Asian style number I was expecting. I think I need to look into Caloi some more.
Due to the rear canti hangar, I'd say the frame is no later than 1997. The lack of any head/down tube gussets and non-replaceable mech hangar would also date it earlier, it could be anything from 1990 to 95 age.