I've got an early 70s super course frame in the garage with a 65cm ST and 56cm TT. HA! yeah some manufactures did some funky stuff. some people like more upright positions though so big frame with short top tube can sometimes be desirable.
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1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear