Eli,
FYI, right now there's a 500mm Tele-Tessar on the big auction site for $350+ S/H.
It is advertised as functional, but has broken glass.
Thank you for the tip of.
For now, Im no able to put that much into a parts lens, with broken glass, though that may change, in the near future.
It may be that I have everything needed to finish the back end of the lens, however, without knowing the layout behind the shutter, mine is excellent, it seems, I can no proceed.
I need the visual references to continue.
I have a possible donor, a C, possible CT* 150, from Japan, to salvage some parts from, but the lens seems to be in really good shape, just needing the slow shutter cleaned and I'm loathe to part it out (I like the mechinical apature indicator that later lenses no longer have and it would be handy to have a 150mm that I would no mind as much, if stolen or damaged, during street and wet landscape work,breather than my CF version.
I'll continue to look for the photos and manual for C & CF lenses, as well as more affordable abandoned & broken donor lenses, for parts, etc.