It is not a 1 of a kind. It is rare but they are out there on ebay, occasionally, and most people have no idea what it is so they are so you have to really look closely for them. It is not the only example graded either and was not even at the time the catalog was made. Someone there is not great at checking SGC's pop report and I do not blame them but if you are going to make a statement like that, it really should be done with a little bit of effort.
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