That view and the overhead shot of the RH front, showing the fork crown top, if to steel, it would NOT be so bright. I strongly believe the frame has been repainted. Decal remnants are 1975 ish, again, not in concert with the metalwork.
Could be a fun project. One way would be to reveal the chrome no matter the surface below, remove the incorrect graphics and get a period replacement set. Bike would look experienced, components could be user level and all would be right with the world.
I must admit that these early 70's Supers are a blast to ride. I would select a different bike for a century, but how often can one find the time for that?