I think it's a Winning Performance or Kerker with some of the end cut off.
Swingarm is nickled. A bit safer than chroming , but may tarnish.
It always was the cleanest around, you could look at your hard to clean spots and it would be clean. That was an often made comment . Most of his bikes were like that..
He has 3 H1 500,s a 69 and 70,s.. 3 different colors . Just as clean.,
Tank is fiberglass, Don I think has some.. has K0 instruments I think seat I think K 1 , if not maybe KO.
I have not seen it in at least 10 years, but ran into him today and found where he had some pics posted.
Actually lives about 5 miles away but rarely ever see him..