My guess is entry-level Columbus steel.
It's welded / fillet-brazed so probably not 80s, but it has horizontal dropouts and a 1" threaded headset so not that modern either - I guess early/mid-90s??
It has mudguard eyes so not a "racing" frame, so unlikely to be top-spec tubes? Something like Zona / Chromor / Thron - round tubes so not Brain / Genius / Max?
Can't see any stickers in the picture so will be hard to tell.
Richard.