[MCoxon]

Restarting a thread originally on 70 Topps proofs and grading. I see most - but not all -- topps super proofs from 1969-1970 are graded "A". None in 1971.

I just bought a Mays 1969 Topps Super Proof, graded PSA 7. Only 2 total 1969 Topps proofs have a numerical grade (including a 69 Topps super proof Pete Rose PSA 4) as of today. I searched and found 1 proof from 1970 with a number grade (a 1970 square proof blank back, Killebrew PSA 7).

Mine is the only 1969 Topps super proof Mays with a number.

Were these 3 proofs given a numerical grade a grading mistake by PSA? Why this one graded and only 2 others? I understand that many/all proofs were considered sheet cut which is why PSA doesn't typically give a number grade. So, is there something different about this one?

Picture attached.