My interest in cards has been rekindled, after an extended absence from the hobby. Now, though, I am directing my collecting efforts solely toward vintage cards.
In the PSA CardFacts article on the E210 Type 1 cards, the author states that it "is viewed as the only true “E” series." (Nothing like making an intriguing statement, and not elaborating on it.

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I'd be interested in hearing more on how one caramel set among many (and a late-comer at that) comes to be viewed as the only true one.
Tedski