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. He later marketed an Evans replica as the L'Evans francais with a 175cc Duten engine
His machines took part in the Paris-Nice events.