Hopefully there's at least one expert in these things here.
For many years I've had the card on the left, which has a stamp on the back that reads SAMPLE NOT FOR RESALE. I have also been searching for a blank back, which I have seen examples of in other player collections. One showed up on eBay last week, so I picked it up. That card is shown on the right. As you can see, it's MUCH darker than the card on the left, plus the registration is way off.
So my question is this: does anyone else have one of these '89 blank backs? Is yours as dark as mine? The card stock looks right and feels right, so I'm wondering whether it's legit or not. I didn't pay much, but that's not the point. I'd really like to knock a card off my very small list.
Thanks in advance.