That is really outstanding John!! Must be a really early version (maybe even late 70's???). Older version SR derailleur. Doesn't have recessed brake caliper mounting bolts. 1A stem. Is it 531 Competition or 753?
The hi-flange hubs are interesting but after thinking about it, they were the hub of choice for racers up until probably the late 70's. The theory being that the shorter spokes resulted in a stiffer wheel.
And an Easter present from the Pope
