The companies origin goes back to 1847 building farm machinery, and moved into the Steam engine business in 1861. By 1931 they built a "Vierzon" gasoline tractor, of a Hot-Bulb design. This was a 50/55 hp design and was followed by several smaller models until 1957. The name Vierzon was dropped after WWII and the restyled versions marketed as "SFV". In 1048 production was about 170 per month with 5000 machines of all types built in 1955.