[randog]

...it is physically impossible to create a mechanical typewriter document that perfectly aligns two or more centered rows of text on top of each other.

Not physically impossible, just very, very, very, very, very, very, very improbable.

Good catch.

[GOPcapitalist]

Yeah, it's one of those 1 in a billion something chances of a match.

Killian would have had to be sitting there for hours with a drafting ruler and perfect knowledge of the exact width of each and every letter to get them to line up perfectly centered!

[ScottFromSpokane]

Perhaps the Heart of Gold was flying by.

[Capricam]

As I recall, there was like a half-space back button for squeezing type into a smaller space. But I could be mistaken. I do know there was no automatic centering back then though. That much is certain.