Thanks for the link & discussion of an old classic. I happen to own the 1969-1971, H with a factory conversion, Ai ring. I bought it many years ago at a camera show for small money. While the glass is near perfect, the knurl on the focus ring is gone and the mount is severely worn.
Mounted on all previous Nikon bodies there was a loose slop that shifted the lens when clicking a shot. The only mount that seemed a match/transplant was from my old Ai'd 50/1.4, & that is still useful with issues. (The 50's mount is tight but the lens' aperture tab gets slammed too hard & I get camera shake.)
Fortunately, the 85/1.8 with my "new" D800, I got a winner. It serves quite well as a short portrait lens.
I may have a question on the latter sometime soon.