From my experience, SGC is pretty good about answering questions. This card is also a 4 but looks better. The only real problem I saw was a tiny flake of surface off the top left corner. Less than the amount I've seen worn off corners on other 4s.
I asked at the Shriners show a few years ago why it was a 4. It took the guy at the booth very little time to find the tiny wrinkle about halfway up the left side. So small it doesn't quite reach the line around the picture.
The other couple grades I asked about were similar, some small hard to see thing I'd missed. Overall, the experience made me better at examining my cards before sending them.
"A" isn't always altered. Of the few cards I've had rejected, one had factory but very rough cuts top and bottom, another didn't make the minimum size.
With the amount of space between the card and gasket on the Speaker, I'd bet it's undersize. Undersize can be factory, but I don't think any grading company will grade stuff that's undersize with a number. I think that's mostly because most collectors associate undersize with trimmed, and don't understand the difference between a factory cut edge and a trimmed edge. Another of my mistakes was a card trimmed on all four sides, that was full size. I just plain missed the trimming while I was looking for which cards to send in.