1923 $1 notes were printed "4 up", on a small sheet of 4 notes. Each note has a different check letter A, B, C, D. There are only a few known examples of 2 notes still together from an original 4 up sheet. Extremely rare, and priced just as the regular value of the combined 2 notes. Both EPQ. One note AU-53, one note CUNC-64.