1964 beatles diary card 23a ringo starr

i just have a question i hope someone can help me with ...i have just listed 6 different 1964 beatles diary vending cards on ebay and i have had 2 emails to end the listing early on 1 of the cards its the #23a ringo starr...why is this card special over the other ones? i havent gotten a bid on the others yet but this one seems to be getting some good action im just not sure why..is this a error card or what? all help would be appreciated..thanks terry

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A friend of mine just listed several of these on ebay (currently). PSA graded of course!!