I second the medmt.8k link. the info on there is indespensible.
Jim the hassy should be to you shortly. Probly today I bet.
I hope you enjoy it as much as I have. (damn those expensive german optics and my meager budget)
altho Im really looking forward to the Mamiya. Having a longer lens will be fun to experiment with.
From my limited knowledge the C CM T* designation mainly geared around the year of its introduction and the coating/multi coating.
All I know is Ive been floored by the lens and after it was CLA'd its been so smooth and the timings on the shutter are SPOT on.

enjoy.

[scooter wipes away the solitary tear of nostalgia]