Circling back to the first series from 1963, in particular the 4 cards with different color borders on the bottom, fairly being one of these. I think that it was mentioned that these cards are on both sides of the middle of the sheet. So by there being 3 variations blue, white and yellow, does this imply that there are 3 printing sheets? A B and C? or a fourth where no variant color border shows up? a D sheet. So the 1st series may have had 4 different sheets. Card #29 and the debusschere definitely are on different sheets.
BillP
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