I've been corresponding with a New York collector who is seeking recognition for what he has identified as "shaded-back" variations on (so far) nine different E90-1 cards.
The picture here shows (in red) the areas on which a gray shading has been found on these potential variations.
I'm here to ask you to check your E90-1 backs for such shading. I don't want to name the cards that have been so far identified, so as not to taint the results.
At this point I don't know if this is a legitimate variation, a printing anomaly or a kid with a #2 lead pencil.
If more than one example of the shaded back can be found for one or more of the currently known players, we may have a true variation to consider.
Please post 'em if you've got 'em, or send me a PM or e-mail. Thanks much!
E90-1 back shaded.jpg