1908
Merger of the small pipe firms Ostorero (22 rue du Faubourg Marcel) , Grenier (rue Carnot) and Vidaillet-Gros (22 et 24 rue des Etapes).
1918
The Gros-Grenier- Ostorero & Cie acquires on one hand the premises at 22-28 rue du Faubourg Marcel and on the other hand those at 12-16 in the same street.