Yellow/Black Mono
AULP1267YBM.a
AULP1267YBM.b

As per AULP1267YBM.a except altered spacing of side numbers
AULP1267YBM.c

NORTHERN SONGS royalty stamps
AULP1267YBM.d

NORTHERN SONGS royalty stamps
Side number spacing variation from AULP1267YBM.c