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 D12 model tractor belongs to the Allis Chalmers D Series. The D12 is a Row-Crop Tractors type, that is used most often in Agriculture Tractors. The D12 tractor is operated by a engine. This configuration improves real-world effectiveness.