Fr. 2119-A*. 1977 $50 Federal Reserve Star Note. Boston. PMG Extremely Fine 40 EPQ. Mismatched Prefix Letters. Serial numbers A04447354* & K04447354*. Erroneous "K" prefix of upper right serial number which would signify the Dallas district, although this replacement is from the Boston district. This serial number is recorded in the census of <em>United States Paper Money Errors</em> by Dr. Frederick J. Bart. From the Mismacthed Serial Number Collection.
