Fr. 1621. 1957B $1 Silver Certificate. PCGS Banknote Choice Uncirculated 64 PPQ. Mismatched Serial Number Error. Although subtle, mismatch errors like this one are among the most desirable of those that manage to escape the quality control processes of the Bureau of Engraving and Printing. This example bears two separate serial numbers, U37034652A and U47034652A, a subtle difference that would have likely avoided detection in the absence of close scrutiny. <p><p>Noted for "Premium Paper Quality" by PCGS-Banknote.
