not getting anything conclusive from the pics, but some more confusion...the Haden crown and BSC BB shell don't help pull this together!
The cable gudes under the TT are sort of unusual, but the rest of the frame details look sort of "generic Italian" and with a 27.2 seat post might indicate a Columbus SL tube frame
The big hole in the center of the BB shell could be original, but that second hole looks like an after-market mistake, and why would anybody do that?
I'm not sure if the chainstays are oversize, but they don't look it...the seat stays may be "bi-conical" or tapered from center to both bottom and top...can't be sure of that either. Hard to "read" pics with a glossy black paint!
130 rear (if original spacing) could help nail down the approx. time it was built...perhaps '90s...or this might have been spread from 126.