All the large auger heads are 200 series. If the decal shows 220F then it is a late 200 series with a floating cutter bar. This would be a better soybean ehad. For wheat and barley you want a rigid head. The later model would be a 220R head.
The small auger heads where quick tach heads. They did not have a model number.
The newer heads went to the 900 series and then on to the 600 series.