Sigma

CH, 1909 – 1914

Sté Industrielle Genevoise de Mécanique et Automobiles, Chene-Bougeries

Made in the former Picker-Moccand factory, the Sigma car took its name from the initials of the company. The Sigma cars carried the Greek letter Σ in the middle of their round radiators. The Sigma cars were medium-sized 4-cylinder vehicles, originally with 8/11hp sv engine. In 1911 the Sigma car company acquired a licence to built the Knight sleeve-valve engine in 18 and 28hp sizes, and the Sigma cars also made 15 and 25hp poppet-valve engines. Sigma cars achieved many successes in hill-climbs, and took second place in the 1910 Targa Florio, driven by de Prosperis, the Sigma car agent for Sicily. He entered a Sigma car again in 1912 and 1913, but came no higher than 11th, and 15th respectively.

France, 1913 – 1928

Sté des Automobiles Sigma, Levallois-Perret, Seine

Pre-war 1 Sigma cars used a variety of 4-cylinder Ballot engines, in sizes from 8 to 20hp, chassis of the Sigma car being made by Malicet et Blin. Just after World War 1 a short-lived 2-cylinder Sigma car was made, but most of the vintage Sigma cars used 4-cylinder proprietary engines and were of very conventional layout. The 1.494cc C.I.M.E. engine of 1925 had a single overhead camshaft, but other Sigma car models had sv units, by SCAP or Ballot, from 894cc to 1.614cc.

Source: Georgano, encyclopedia of motorcar; GNG

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