Manufactured by François Haustgen 1902-1904.
33, Rue de L'Esperance, Paris.
Also listed as Haustgen and Roussin, a Haustgen motorcycle was presented at the 1902 Paris Salon.
Produced Iris air-cooled and water-cooled IOE motorcycle engines, and Iris motorcycles.
The Gloriator used Iris engines.
Francois Fernand Haustgen patent GB190223658A: Improvements in Clutch Mechanism for Explosion Motors Principally Intended for Motor Cycles, published Feb 1903.
The Iris brand was used for French, British and Italian motorcycles, and also for British sidecars in the 1920s.