"Glycerine Tooth Paste," from the Parisian perfumery Gellé Frères, by Jules Chéret 1878

This poster advertises Gellé Frères Glycerine Tooth Paste, a product from the Parisian perfumery Gellé Frères. It was created by the French artist Jules Chéret, often referred to as the "father of the modern poster," who was a master of the Belle Époque style. The poster features a joyful, lively woman—a "Chérette" as they were known—which was a common and influential motif in Chéret's work. The poster mentions that the product's process was created by Eug. Devers, "Chemist Laureate," and won a "Gold Medal" in Paris in 1878, which is a key detail that helps date the original poster. The company's address is listed as 6, Avenue de l'Opéra, 6, Paris.