$20 / $10 Double Denomination Error DUAL DENOMINATION King of Errors PCGS EF 45

$20/ $10 1974 FRN Double Denomination.

Quality control at the Bureau of Engraving & Printing reached new lows during the 1970s. Flowing forth from the Bureau's loading docks and distributed as needed to banks across the United States by the Federal Reserve; error after error entered circulation. From minor Gutter Folds to dramatic Printed Folds attentive bank tellers and eagle-eyed laypeople pulled the fruits of the Bureau's control quality (or lack thereof) out of circulation keeping them as keepsakes that trickled out onto the market as time marched ever onward. Yet there is one error type that is spoken of with bated breath and the utmost reverence at the hands of collectors. Known as a "Double Denomination" error; this error is exactly as one envisions it.

Featuring a face impression of a $20 and the back impression of a $10; this fabled error type has long been the cornerstone of some of the greatest error collections ever assembled. Tracing its lineage back to a shipment delivered to the Houston-area in 1978, a number were able to escape into circulation before an intervention at the hands of the Federal Reserve Bank of Dallas saw the vast majority of that shipment confiscated and swiftly destroyed. Few and far between at present; those few that are available are unable to fulfill the often voracious demand from collectors who have the means to pursue such an item.