Just to add to this a little - I know that the 1959 Topps - 1959 - there are white backs and gray backs - and the white backs have a thicker and sturdier feel than the gray backs.
I'm just wondering out there, while I feel better that I now know that there were different colored backs to the 1969 cards, was there also a difference in the sturdiness of the backs, where the whiter backs were a little thinner feeling?
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