Forty years ago this week, the Chicago Bulls drafted Michael Jordan — giving rise to the holiest of basketball grails. Twenty-three autographed Jordan rookie cards would be scattered across the globe, in the form of Wonka-esque golden tickets. But at last check, nine of these cards had vanished. Correspondent Bradley Campbell gets to the bottom of a seven-figure mystery — spanning four decades, three continents, black-market conspiracies and an armored-car robber — that presaged the modern era of sports collectibles as an asset class.

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