Alongside the Claeys MZ, a smaller 2.2-meter M 73 was introduced in 1956. A further developed 3.0-meter model from the late 1950s was designated M 80, and a more powerful model introduced around the turn of the 1960s was called M 103. The M 80 was equipped with a 3.6-liter engine from the Fordson Major. The M 103 used both 4- and 6-cylinder engines with power ranging from 65 to 88 hp. The cutting width of the M 103 was also 3.0 meters, but the threshing drum, sieves, and grain tank were larger. In 1965, the M 80 was replaced by the M 89, which had a slightly more powerful engine and a threshing drum housing with a more rectangular shape.

Until 1963, the brand name was Claeys; after that, it changed to Clayson. It is known that Claas filed an objection to the use of the original name. Fahr sold these models, among other places, in Germany above their own product range.

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