I am not a huge junk era collector, I was just sorting through cards (mainly retrieving plastic entombing junk cards) and I came across this. I originally just kept going until I realized all the names were in black or white and I thought I had seen a blue one and went back.
When I pulled it out I originally was thinking the blue was printed on top of the black. Yet the horrible surface abrasions led me to think that what ever caused that caused the hue shift. The card getting wet and possibly diluting the black at the factory may be a good theory. I did a close up and it is noticed that the Topps logo is see through as well.
I just didn't know if this was a known variant of the set or just a stand alone flaw. I find it intersting that most flaws from the time were basically just printing flaws, some of them got recognized and categorized (Comstock Yellow and Thomas NNOF) while hundreds never did. I just didn't know for sure where this landed on that spectrum.