31, rue Poussin, Paris.
Geo Dupuy built the Avance 175cc of 1925 and also G.D. motorcycles.
The firm also sold Ner-a-car and Evans motorcycles, and was the agent for Cyclemotor. They later marketed an Evans replica as the L'Evans francais with a 175cc Duten engine
Dupuy's machines took part in the Paris-Nice events.
Sources: La Moto Francaise, zhumoriste.