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JimBCan those of you who have collected these throw out some guesses as to the relative scarcity of the different backs. I know the red Crofts candy is the toughest, but how tough is the blue compared with the black or red? How do they compare with Crofts Cocoa? What about Dockmans? How do you think they compare with other standard E sets from E90-1 - E106? Thanks,
JimB