Emel, Cuzon et Cie in 1900, and later Soncin, Gregoire et Cie
Louis Soncin built engines some of which were very large and powerful in the day. A racing machine with a 500cc Soncin was part of the Guélon Collection.
The Olympic Games of 1900 had an event for cars and motorcycles, Paris-Toulouse-Paris, a distance of 1347 km. A Soncin motorcycle is listed as a competitor, ridden by Durand. There were 28 entrants and 9 finished. The Soncin came 7th.
In October 1902 Soncin withdrew from the company leaving the rights to Pierre Joseph Grégoire.
In 1905 the company developed a twin-cylinder 8/10 HP engine, and began car racing. In 1906, the Poissy factory expanded, and in 1907 the company transferred its head office to Levallois - Perret , then to Neuilly-sur-Seine, with production remaining in Poissy.
A Soncin engine powered a motorcycle built by the Chase Brothers in 1903.
Sources: Bourdache (pp 88, 96); Guélon Collection; wikipedia.org; isoh.org
