New member, 2nd post!
Here is my Klein Quantum road bike. Bought it new as a frameset before Klein was building complete bikes. I think it is one of the last series Gary actually touched, I have an email into Trek Support to see if I can find out anything else. They said so far that their records do not go that far back. I bought it sometime between 1986-87. I have sent them several pictures to help identify this bike.
It looks to be a Quantum Elite, from 1988-89.