Card #588 - Checklist 5
I'm guessing its original owner was doing a lot of trading. While some of the boxes have been marked, others have been erased, indicating that the card was no longer in that collector's possession. In my case, the marks were fortunate (I ended up getting a great deal on the card since it was damaged) but it shows some of the abuse checklist cards received at the hands of those who wanted nothing more than to mark them up.
Actually, I'd assume that a checklist with all the boxes filled in would be a sign that the collector was happy indeed, as he (or she) had finished the series. That's why this card seems to be so sad...the collector never completed it. Fear not, little fella...you and your other 659 buddies are all back together in my binder, and I'm not going to subject you to any more ink stains.