I know this is not Pre-WWII but it is a HOFer and 1/1(only known). I have owned/still own several other 89 & 90 Score wrong back pairs of HOFers. In 20+ years of looking I have only found 2 1990 and 0 1989 Score wrong back cards that I did not own first.
This is a Wade Boggs/Roger Clemens 1990 Score wrong back pair. Click on the pic for a short video of them being turned over to show both side of the cards.
