I've got a bunch of mid-grade 71s, so I wanted to chime in. They offer a nice comparison of current grading standards.
Ernie Banks PSA 5 - Overall the corners on this Banks look weaker than your Mays, but in what I think will be a common refrain, the top right on that Mays is holding it back IMO.
Roberto Clemente SGC 5 - REALLY weak corners here. ALso the surface of this card has some light damage as well, seen especially in the black area in the bottom border. Makes me think your Mays could definitely pull a 5.5 or 6 from SGC.
Jim Palmer PSA 7 - This one looks about right. I think the corners are strong enough to be in a 7.5 or 8 holder, but the slight edge damage along the right border would probably prevent that.
Brooks Robinson PSA 5.5 - When comparing your Mays to this Brooks, your Mays grade seems harsh (by 0.5 to a full grade). The right edge on this Brooks is beat up worse than any edge on that Mays. All 4 corners on this Brooks are stronger than the top right corner on that Mays, however, the other 3 corners on the Mays look stronger than ALL the corners on the Brooks. These 2 cards make for an interesting comparison.
Al Kaline PSA 5 - This is the one for me, that seems like a harsh grade. I think this could be a 6, for the same reasons your Mays does.
Frank Robinson PSA 7 - This grade feels generous, by about a half grade, but I don't think looks out of place in a 7 holder.
Hank Aaron SGC 6.5 - I'm surprised this card is an SGC 6.5, since that bottom right corner ding is worse than it looks in the scan. For me this card is an example of a theory that I have on a differing approach to grading vintage cards at PSA vs SGC. In my opinion, PSA takes a maximum scoring approach. By that I mean PSA sees the top right corner on your Mays and decides that because of that corner the best the card can be is a 5. I have several examples where SGC seems to take more of an "averaging of the features" approach. Hypothetically, for the PSA 5 Mays, SGC might say that surface = 7; centering = 6; edges = 7.5; the left corners = 8.5; bottom right corner = 7; top left corner = 4. And they might come up with an average of 6 for the whole card. (** I'm not saying they do this, but I have a few cards that make me think they do**)
Willie Mays PSA 6 - I think this card is a great comparison to your PSA 5. Centering is better than the 5. Corners are 5.5 - 6 worthy on this one, but that left edge damage is significant enough that I'm surprised it got a 6. This PSA 6 also has the benefit of not having a corner as bad as the top right on that PSA 5.
Overall, it seems that some grades might seem harsh or generous in different ways. But overall, it is a subjective game that we play by submitting cards.
Either way, beautiful Mays, Bobby!
