Part Number: 12272131F (Prearrangement base) Part Number: 12272132F (Front adapter gr.1) Part Number: 12272133 (Post,electrical-mechea19207) Part Number: 12272136-1 (Transistor) Part Number: 12272136-2 (No description) Part Number: 12272137 (Microcircuit) Part Number: 1227213BLU (Cover, bottom) Part Number: 12272142 (Heat sink) Part Number: 12272143-1 (Shaft) Part Number: 12272-15 (Track assy) Part Number: 12272150 (Control unit convert) Part Number: 12272156 (Generator assy) Part Number: 12272158 (Ckt card assy) Part Number: 12272-16 (Track assy)