Posted By:
Ted ZanidakisI acquired the light Blue colored Musial way back in 1981 at the Valley Forge (PA) Show.
I have seen only one more with this light Blue background in all these years. I would say
it's definitely a color error (and not by design).
As I said in a prior post here, I think Leaf employed more phases in the printing of these
cards than the standard 4-color process. I've seen too many color variations in the 101
cards in this set....implying that there had to be at least a 5 phase process.