Flatlander:
To my knowledge in the mid-70s there was no such Fuji model as the Supreme.
Fuji did do a great job on those upper level bikes; nicely lugged frames, drilled out components and with the Ace model, the first fully equipped Dura Ace bike (came in orange only).
Rode a Fuji Finest for several years; fully chromed frame with a very thin dark blue paintjob (other color choice was white) makng it look almost translucent and the lugs were full chrome. Nice stuff!