As I've stated many times before, my idea of a true variation is when the printers intentionally made changes to a card in between print runs, thus creating specific differences between the two versions of a card. Then there are other oddities that exist and don't fit that notion, but are quite interesting nonetheless.
Check out this 1970 Joe Morgan card. At the top border there appears to be a pinhole there to the left of the 'A' in Astros. My first thought was that some kid in Texas had this card pinned to his bedroom wall between sexy photos of Angie Dickinson and 'Hanoi Jane' Fonda…but as you can see, I've located a few that have the very same dark anomaly. It's not a pinhole, but a stray blob of black. If nothing else, it's bizarre placement exactly where a pinhole would appear is very intriguing to me.
So, for you guys who collect these types of minor variations, add 1970 #537 to your checklist.
1970morgan.jpg
Edited to add: I just ran across an ebay auction that has "top middle dot" in its description, so maybe this variation was already known?? Or…perhaps the seller is just pointing out what he believes to be a defect/mark on the card?? He offers no other info.