Production was disrupted during World War I, and was stopped in 1924 for three months when the Ruhr Valley was occupied by French forces.
Production amounted to only 144 units, and about 70% of the Neuss plant was destroyed in Allied airstrikes.
[1] Emergency production resumed in 1945 and the plant was restored, with new FS and FG tractors produced from August 1946.
Although the FG and FS were updated with new styling, their gasoline engines were unpopular in Germany, and production shifted to diesel-engined models in 1950, the DF-25.
[1] The second-generation D-line offered a more diverse range of products, some marketed under the Farmall brand.