Serial number stamped into the flange where the engine and transmission meet on the left side of the tractor.
BELT PULLEY
RP
1220
Spee
2556ft/min / 779.07 meters/min
About Allis Chalmers Tractor
The Allis Chalmers D12 tractor is part of the D Series. The D12 is a Row-Crop Tractors type, which is used mostly in Agriculture Tractors. The engine of the D12 tractors is impressive. This arrangement is more practical in the real world.