Double Serial Number Errors on Small-Size Notes: When Both Numbers Print Twice and the Auction Results That Prove Their Value
Double serial number errors rank among the most visually dramatic and genuinely rare mistakes to escape a Federal Reserve printing facility, occurring when the serial number is printed twice on the same face of a note. Understanding how these errors happen, how to authenticate them, and what they fetch at auction can mean the difference between a shrewd buy and a costly mistake.
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