uh...pardon me if this is an ignorant (and snarky) comment but have we seen a pic of the steerer on the OP's BLUE painted "areo/uniclown" fork or just other examples (other colors) that show some popular butts with popular rifling styles?
OP says "It appears to be Columbus or Dedacciai.", personally I have seen only one "labelled as Deda" fork and that had no rifling in the butt, if not for the fork blade label I'd have had no idea what brand tubing was used. Also it came on a frame with a Deda label, so there's that, but not a guarantee.