I have the 1968 version and 2 different versions of the 1977 ones - one with orange Rokkor and the other with white Rokkor but they seem identical to me. The 1981 version is pretty hard to hard and I have only seen it once or twice on Ebay.
After I get my NEX5 and MD->NEX adapter next week, I could do more comparisons. By the way, you converted all those lenses above to EOS mount?
Oh, I just list the 100/2.5 lenses. I don't have one yet. I only have the 100/2 MC.
If you mean all my Rokkor lenses (35, 58, 85, 100), yes I convert them all to EOS