A Brief History of the Marque
Manufactured: 1920 - 1927, Lyon (or possibly 1919-1926)
Office de Représentations Industrielles et Automobiles Lyonnais
Engines in use were predominantly MAG, and it appears there was a relationship with that company.
Racing Sidecars ¹
1921 Sidecars 600cc :1. Colguet (Orial), 2. Leslie Piney (GB, Triumph), 3. Coudert (?)
1921 Sidecars 600cc : 1. Raymond Guiguet (Orial), 2. Moret (Orial), 3. Lacour (Orial)
1923 Sidecars 600cc :1. Moret / ? (Orial), 2. Alexandre Hommaire / ? (Orial)
1925 Sidecars 600cc :1. Raymond Guiguet / ? (Gillet), 2. Moret / ? (Orial), 3. Minot / ? (Triumph)
In 1922 Koehler-Escoffier was taken over by S.A.M., under Raymond Guiguet, an engineer and former racer with Orial on 600cc side cars. ²
There is some possibility that Orial produced a single cylinder machine perhaps as large as 750 cc but this is disputed.
Orial bought the GL marque after the death of Maurice Le Pen and subsequently fitted MAG engines to the rebranded machines. In 1922 Orial's main rider, Guiguet, moved to Koehler-Escoffier leaving Drevet struggling somewhat. The marque foundered in 1925.
There was a short-lived Orial brand in Germany which changed its name to TWN after a legal wrangle with the French firm.
Sources: zhumoriste.over-blog.com et al