Need some help with a 62T Aaron card

Hey guys, I need some help! I just purchased a few cards at an estate sale (I know that sounds like a line but it's true) and one of them is a 1962 Topps Hank Aaron card that has the back of card #367 which is the checklist. Everything appears normal on the front and the back looks like the normal back of the checklist card... is this a rarity or a pretty common error for this card as I haven't found anything on it yet. Thanks for any help!
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Bosox1976
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