||Original SGTM Marseille French vintage travel poster. SGTM: Societe Generale de Transports Maritimes. Well, can you see the ship? It's right above the letters SGTM, which stands for Societe Generale de Transports Maritimes--the French way to travel by water. These boats can take you to Algeria, Spain, Italy, and South America. This poster has been archival mounted on linen, and it's in good condition.