The old Strongsville, OH Holiday Inn show. It is no longer a Holiday Inn, it is now a Best Western, but the location is the same, and the predominantly vintage and pre-war focus is still in place, as it has been since 1979, despite various different backers/sponsors/promoters putting on the show over the decades. And aside from the two years the show was suspended due to the pandemic, it is still to my knowledge, the longest running major sports card show of all time, and that includes being around longer than even The National.
They now currently call it the Strongsville Sports Collectors Convention.
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