1989 Topps Gold Borders
 

Not sure if I'd call these proofs, variations, or prototypes. Obtained about 10yrs ago from Topps Vault ... these cards have fully-printed backs.

On the front, in the word series.

The ies on the left is missing an arc from the bottom of the letters. The one on the right is normal.

I didn't know the Sizemore existed, the Cubs traded him to the Red Sox in August 1979 so I'm surprised the 1980 proof still had him as Cub. What is the difference on the 1980 Cubs Future Stars cards? I have compared them to the issued card and can't find a difference.

The Sizemore card is a pretty neat card.....on the FS card, it looks like there are some cropping differences on the images for first two players pictured. The color of the "Cubs" in the banner is different also, but that might be because the card is a proof?

1949 Questions
 

I always assumed the 1949 Bowman set used 36-card sheets. These overprint examples are farther apart numerically than 36 by a long shot. Feller is #27 while the overprint is #99 Gustine. Kooks is #31 while the overprint is #103 Tipton. The difference between the two is 72 in both cases, likely two sheets? A mystery.

BTW, the card that is partially into the Kokos #31 is #32 Eddie Yost. Apparently the red commercial at the bottom got changed before too far along.

In this case, though, the logic is a bit flawed. Because there are overprints doesn't necessarily mean the cards were being printed at the same time. For instance, it's possible a sheet with a printed back was accidentally included with the sheets of blank paper at a later date (when a different series was being printed). And there is always the possibility it could have been just a piece of scrap the printers used to test a print run.

https://img.comc.com/i/Baseball/1959...&size=original
1959 Topps - [Base] #223.2 - St. Louis Cardinals Team (White Back)
Courtesy of COMC.com
Recurring print defect in right border.

1957 Focus Grasshopper Focus
 

http://imagehost.vendio.com/a/204295...FREAKS_NEW.JPG

..I'm showing a normal Logan and Long for comparison--- all the OOF cards have a strong green bar across the top of the photo....

..in hand , they induce a migraine.....rumor has it that some people deliberately seek out and collect these...yup , that's what I've heard....

..

Surely not

Yep, you have heard correctly. I have differences in all 407 of them.