That looks pretty sweet to me. For comparison, I sent these two in with one of Bobby's group subs, and the card on left came back as PSA 7 OC (and it has color shifts), and the one at right a PSA 6 (with a rather large print line)...
1958mantleas487two.jpg
Yours (as far as I can tell, and lacking any unseen problems) blow both of these away, with stellar clarity, sharp corners and decent centering. PSA 7 at a minimum, I would say.