The renewed International combine harvester lineup for the year 1973 included four models: 221, 321, 431, and 531. The largest model had 5 threshing units. The smallest model, the 221, was practically just a renamed 8-51. It soon disappeared from the lineup. The differences between models 321 and 431 were minor. As with previous models, the 431 featured a 6-cylinder engine (until 1974 there was also a 4-cylinder version) and hydraulic adjustments for the reel lift. The 541, which replaced the 531, had an updated cutting table, a hydraulically rotatable unloading pipe, and a rotating engine air intake. Alongside their own models, the Sampo 35 was also sold under the name IH 211.

This is an automated translation. Please report any issues in the translation.