Vintage Weight Weenie.
A joke in the other weight-related thread, but I realized that I really am a weight weenie, and have been since i first got my butt kicked going up hill. So...let's build a hypothetical lightest bike - and put a cap on the parts of, say, 1982, because that is CR's minimum age break.
I think we should start with a Teledyne Titan frame. Is this the lightest?