A Brief History of the Marque
The Siemm company presented their first bicycles at the Paris Salon in 1893 which were advertised as Métropole Acatene because of the lack of drive chain (chaîne d'entraînement).
In 1899 built tricycles with De Dion-Bouton engines which were also marketed as Acatene, and in 1902 advertised a cardan motorcycle built by Chapelle.
In 1912 Metropole is listed as the parent company of both Liberator and Perfecta
The marque continued, with numerous changes of ownership and location, through to the 1940s and 50s when they built mopeds and autocycles before joining Cocymo.
Sources: Bourdache (p446), et al.