Nobody has to tell you that the APO Ronar's are the modern multi-coated Ultra Sharp equivalent of the Goerz RD Artars. Both are dialyt types but the Goerz never made it into the multicoating world.
This one is in a Prontor Press shutter. Aperture scale to f90 is not factory but is accurate. It is scratched onto the shutter.
Shutter running perfect at all speeds. Hold open in "T" for focus. Has the jamb nut. One little bump on lens shade.
Barely covers 4X5. Perhaps the best detail lens on earth. Move in a bit and get molecular with this one. $144 + shipping