I picked this up this weekend, and thought it was odd enough to get its own thread.
I believe it's an '81 Vista Aero Adamas.
It caught my eye as an old aero bike, but then I noticed it was labeled as Tange Aero tube, and had more Adamas AX components than I've ever seen before.
The original owner claimed that it was a $600 bike when new - but I don't know that it really had that big a markup.
FirstFlight bikes has a Dura Ace version with a much better built frame

Interesting stuff though.
Downtube, fork blades and seat stays are all aero. Label claims Tange Aero. Lugged construction.
Rear derailer is like nothing I've seen, and is interesting because it uses a wrap around cable guide instead of a casing to direct the cable pull.
Brakes are the center pull roller style, and the aero levers are really odd looking.
Above the tube shifter mount.
Peculiar "roll off" on the Sugino seat post milling. Seat stays are brazed onto the outside of a stamped seat lug.
Front derailer cable wraps around to the drive side to pull sideways.
Hubs have the flanges offset to allow all spokes to be inserted from the center.
Six speed cassette rear.

Anybody remember these?