1980's bicycle geometry?!?!

[Hilltopperny]

Hey folks! I am sitting on a pile of 1960-1980's old steel bikes. As I pick through them I am noticing the way they are set up. A lot of bikes with 58cm c-c seat tubes 55.5-56 top tubes with very little seatpost and shorter stems. These are mostly touring bikes, but the non touring bikes are pretty similar as well. Is this pretty standard fare for the bikes of this era? Are moderns 58cm bikes known to have 55.5-56cm top tubes?

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