Fr. 964. 1914 $20/$10 Federal Reserve Note. Boston. PMG About Uncirculated 50. Dual Denomination Error. An astounding large size dual denomination error which is one of just four examples known from this catalog number. This example is the A position note of a cut sheet of four 1914 Burke-McAdoo signed FRNs from the Boston district seen with a $20 face impression and $10 back. The four notes can be traced back to the fabled collection of Albert A. Grinnell and were offered as lot 4831 of Barney Bluestones June 1946 sale where they realized an incredible $3,550! By comparison Grinnells Fr.379b 1890 $1000 Grand Watermelon sold for $1,230 in November of 1944.<p>All four examples are recorded as About Uncirculated, a fact confirmed here by PMGs assigned grade. This example displays four boardwalk margins on both the face and back. The paper is bright, creamy white in color and displays only light handling. The plate impressions are darkly inked and vividly detailed while the deep blue overprint is boldly presented on the face. It ha been more than 15 years since this note was offered publicly. Here is a rare opportunity to acquire a note whose significance has been long understood by the collecting fraternity.