[coimbre 21]

That tilt is also known as diamond cutting. This happened during the cutting process where the card sheets slid out of alignment before or as they were being cut. Personally I think a diamond cut should automatically knock the grade down one or two points, depending on severity, just like 80/20 or worse does. As strict as Beckett can be with grading though, I've seen a few BVG cards with slight to moderate diamond cuts that have graded 7 and even 8.

Reading through the standards above though, at one time years ago, back centering criteria was not so well defined. I even heard a Beckett grader state at an open house 7-8 years ago that back centering did not really matter that much. I have a 1968 Topps Bench rookie BVG 8 whose OC/MC back proves that. My point in all of this is that maybe Beckett could have refined their view on diamond cuts since then too.