I don't have any lens-specific info for you, but do have an old standard, Method for Determining Aperture Calibration of Motion-Picture Lenses. It's USA Standard PH22.90-1964 (reaffirmed in 1969). This was the standard for determining both f-stops and t-stops back in the day.
Originally Posted by Modern Minoltian
It's too tedious to describe, but if you look up Appendix II at the following link, it looks like the same basic info: http://www.archive.org/stream/journa...irich_djvu.txt
Even if you can dredge through it, my guess is that you'll decide you can live without t-stops.