Fr. 2118-A. 1974 $50 Federal Reserve Note. Boston. PMG Choice Uncirculated 63 EPQ. Inverted Back Error.Type II inverted back error. A massive faulty alignment and inverted back printing is found on this 1974 Boston $50, and is perhaps one of the more eye catching error types out there. This note is found in a highly attractive Choice Uncirculated grade, with PMGs EPQ designation applied. An "As Made Wrinkle" is noted on the back of the holder as well.