the 4 listed variations in PSA pop report are:
1st Name Not Outlined
1st Name Outline in White
Batting, Pinstripes
Portrait
not sure how they compare to the letter assignments in your beckett article, but there are far fewer registered slabs for 'portrait' so i'd venture it's the most valuable today regardless what was meant 20 yr ago (but I don't collect Mantle and so could be wrong)
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