FR 2071-K  $20/$10  1974  Federal Reserve Note Dallas PMG 40 - Double denomination error notes, commonly referred to as the “The King of Errors,” can be regarded as the apex of error notes. Highly sought after by collectors of all things cool, these notes fulfill a need for this unlikely United States paper money error. Since all US notes are printed at the Bureau of Engraving and Printing and follow strict procedures, the backs are printed first and then allowed to dry. Once dry, the sheets are sent to the second printing press to receive the correct face printing (it was at this point where the error occurred). The sheets would then move to the next printing press to receive the overprints (the two seals (Federal Reserve Bank and Treasury) and the serial numbers). Once the sheets have received the third print, they would be cut into individual notes, bundled and released to the corresponding Federal Reserve Bank for distribution. This pleasantly preserved error appears to have undergone no actual circulation except perhaps a onetime fold in half and then in half again. The folds are however so light, they are not visible inside the PMG holder. In all actuality, this note appears to be a Very Choice Uncirculated note. So, if you are in the market for an affordable, PQ, Double Denominated note, EUREKA - you have found it.