I'm not sure what the PSA criteria for creases is. That's a light crease to me but I'd put it at VG. The centering on the front is nice. I'd be willing to guess the grader missed the small crease because they probably handle so many cards a day and after a while it just becomes mundane and complacency sets in.
I'd just call it a weak 4. I've seen so many cards graded with defects that should have been considered but missed by the grader. Many of the small defects are difficult to find unless you're really looking the card over closely. But then again, isn't that what people pay for when they send a card in for grading? Oh, that's right, you always hope the grader misses those little things...
