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The Case of the Non-Random Nickel: Rolling Folds Defy the Odds

This 1964 5-cent coin displays a rolling fold (blanking burr) on its reverse face whose midpoint lies at 4:30. By Mike Diamond for CoinWeek… A rolling fold (also called a blanking burr) is a relatively rare planchet error that originates at the blanking press. Under normal circumstances, an array of cylindrical blanking punches (a gang

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