Monet & Goyon is a French marque established in 1917 (according to other sources, in 1915). These three-wheeled scooters with interesting "autowheel" 119cc engine were built from 1919 to 1925. Later Monet & Goyon's Macon factory - which also produced Koehler Escoffier motorcycles - built numerous Villiers and MAG powered machines up until 1939, and resumed production of smaller motorcycles and scooters after the war, ceasing production in the mid 50s. See also: Monet & Goyon - William
"During the First World War, Adrien Goyon financed engineer Joseph Monet to manufacture disability vehicles for war veterans. Their company Monet & Goyon was formed in 1917. Their first engine, in 1919, was a 117cc autowheel, which they also used in their Automouche and Vélauto three-wheeled scooters up to 1925. This was sometimes proclaimed as the World’s first scooter (1919), though it wasn’t: the American 1916 Autoped was actually the first." (from oldbike. wordpress.com)