The catalog prints courses as treble / bass / extra. A zero extra course is left off, so a 15/14 stays two numbers. A zero bass is kept when extra courses exist. The PD40 cell reads 16 / 0 / 12. The human merged it.
The catalog prints courses as treble / bass / extra. A zero extra course is left off, so a 15/14 stays two numbers. A zero bass is kept when extra courses exist. The PD40 cell reads 16 / 0 / 12. The human merged it.