the 1960's featureing all the excitement of the Vietnam war, the Nixon administration, Kent State... and more importantly:
Schwinn Paramounts before the huge increase in production.
Masi Specials, Just ask Joe Englert.
Rene Herse, still doing unique things
Really rare Colnagos and Pogliaghis.
The Introduction of The complete Campagnolo ensemble, a bike from the 60's will function as good as any up till the advent of SIS by Shimano.