Getting back to the original question; does anyone have a theory as to how these color " variations" could have happened?
The two gray backs that I have seen with yellow logo have almost pure yellow with a full-color neck. The redish-orangish "transition" cards and the green-neck cards seem to be limited to the cream back. However the gray/yellow is a VERY small sample.
So, does that mean that the gray stock was used at a time when the ink situation was stable? And how could the red be depleted in the logo, but not the neck?
I really don't understand the actual printing works.
Bill
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