7025. Devanture, métal poli, 1 porte ouvrante, 2 vitrines . Image 65 of a 1932 catalogue titled Ateliers le fer ouvré , published by the firm of Chapelon et Gervais, 14 avenue des Sycomores, Paris 16e, France. Jean Acker et Cie, Paris, printers. Collections of the Bibliothèque Forney, Paris. Artwork itself in the public domain due to age. via https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0002007673/v0065.simple.highlight=ferronnerie.selectedTab=thumbnail
Salon de Coiffure Dames – Messieurs. Devanture, fer forgé noirci ou peint, 1 porte ouvrante. Image 66 of a 1932 catalogue titled Ateliers le fer ouvré , published by the firm of Chapelon et Gervais, 14 avenue des Sycomores, Paris 16e, France. Jean Acker et Cie, Paris, printers. Collections of the Bibliothèque Forney, Paris. Artwork itself in the public domain due to age. via https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0002007673/v0066.simple.highlight=ferronnerie.selectedTab=thumbnail
Paris – Automobiles. Devanture, métal inoxydable, 1 porte ouvrante à 2 vantaux et imposte fixe. Image 67 of a 1932 catalogue titled Ateliers le fer ouvré , published by the firm of Chapelon et Gervais, 14 avenue des Sycomores, Paris 16e, France. Jean Acker et Cie, Paris, printers. Collections of the Bibliothèque Forney, Paris. Artwork itself in the public domain due to age. via https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0002007673/v0066.simple.highlight=ferronnerie.selectedTab=thumbnail
au Palais du Meuble. Devanture fer forgé, noirci ou peint, 2 portes ouvrantes. Image 68 of a 1932 catalogue titled Ateliers le fer ouvré , published by the firm of Chapelon et Gervais, 14 avenue des Sycomores, Paris 16e, France. Jean Acker et Cie, Paris, printers. Collections of the Bibliothèque Forney, Paris. Artwork itself in the public domain due to age. via https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0002007673/v0066.simple.highlight=ferronnerie.selectedTab=thumbnail
I would assume they were selling the store fronts (shop fronts) which could then be installed at your place of business. This is their only catalogue that is turning up online. They were listed as a firm working with masonry with the French government back in the mid 1960s but that’s all that turns up at least as of today.