Bar tape, seat, Dura-Ace shift levers, reflectors, rack, kickstand - not original. Fenders - might or might not be.
Not sure what the front changer is, the rear looks like early Campagnolo from here.

Rear brake mount style is unusual, but some frames (Harry Havnoonian and Hi-E Cosmopolitan) come that way for increased performance (their opinion).
This has to do (as I understand it) with flexy caliper arms combining with slightly tapered rim sidewalls to increase the amount of braking force available.

With all that said, still a h311 of a deal. If I was in Portland right now, my sweetie would be beating on me for buying it...