The M 60023-09 is a 3-way electronic with a Volume/Balance Push/Pull pot, mid pot, stacked bass and treble pot and an EQ PCB for active Pickups. (9 Volt version)
The M 60023-18 is a 3-way electronic with a Volume/Balance Push/Pull pot, mid pot, stacked bass and treble pot and an EQ PCB for active Pickups. (18 Volt version)