I went with the 71-90% option.
I guess it depends on what you call altering.
I would say that is accurate in both vintage and modern. Lower end on vintage and higher end on modern.
For vintage i just don't remember ever seeing cards from the 50s-70's that looked that(PSA 10) nice in the 1980s. Especially those super bright white borders. On modern, those cards get a little prep work before they go to the graders.
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