The 52HP strong IHC 523 wan introduced in 1965 alongside the 10 HP bigger 624.
Fron the year 1967 on the tractors were available with an AWD frontaxle by the ZF Passau Company.
In 1969 the 724 was added as a big brother of the 624. The 3.9 liter engine had 67 HP.
At last the 824 was introduced in 1971, who was equipped at the beginning with an IHC D-239, fron 1973 on with an D-246 engine.
The construction ended in April, 1974.
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