This is a
1971 Topps #603 Pirates 'Team Name in White' (not yellow) variation.
I first saw one about a decade ago at a show, and although the card was a
'Pooreo' (a 1971 Topps with too much white wear), IIRC the dealer still wanted a C-note for it. Told me, "You may never see another one." I had to pass.
It's a true variation, as it is not sun faded or missing the yellow ink from the entire card, and looks identical to all of the other Pirates Team cards from that year (with obvious yellow usage throughout) with the exception of the color of the word
"PIRATES.
"
1971pirates603whiteteamPSA6.jpg