Here are six different PSA graded 1961 high numbered #554 Pirates Team cards from ebay...
1961pirates554.jpg
All other things being equal, they are pretty similar to each other in the fact that they are all pretty far off-centered, nearly hitting the bottom border (except for card #1 which instead nearly hits the top), and having a large amount of white space on the right side. Rule of thumb says a PSA 8 OC (with some exceptions, of course) would be/could be called a straight PSA 6 if the submitter asked for no qualifiers. I have no idea if the sixes here were regularly PSA graded cards that received 6's or if they were, in fact, 8 OC's that got 'demoted.'
If centering isn't a big factor with you, I'm pretty sure each of these cards would be close enough that any one of them would fit into your collection or 1961 set. But...and it's a BIG BUT...only one of these six cards has a qualifier on the label, the last one. In all fairness, it is a hair closer to the edge than the others. On the positive side, its number grade is the highest of the lot. So let's look at the ask prices. Would you take...
the first card (PSA 6) for
$125
the second card (PSA 7) for
$185
the third card (PSA 6) for
$145
the fourth card (PSA 7) for
$79.99
the fifth card (PSA 6) for
$110
...or the sixth card (PSA 8 OC), the only one with a qualifier, for a measly
$30?????????
Some people need everything perfectly centered, and that's fine, but for the rest of us, does the very minor difference in centering on the card with the qualifier make you consider paying a ton more (up to six times as much) for a card with a lower number grade, simply because it doesn't have The Scarlet Letters
OC on the slab?????
I happily jumped on card #6.