Interesting! and cool...IIRC Tom Kellogg was the main builder but not the only guy who made the top models...can't recall whom the other torch-bearers were. It does look like the rifling in the steerer is the Columbus style (curving) rather than Ishiwata or Tange (straight), but can you verify: 5 ribs or 6? Is that BB shell an Hitachi or a Roto (can't enlarge the pic on my computer to see)?