"Jj Rousseau Porcelain Medallion XVIII."
Porcelain medallion representing a portrait of Jean Jacques Rousseau (1712-1778) in blue enamel on a white background. Probably published in commemoration of the death of the writer in Switzerland at the end of the 18th century. Diameter of the medallion: 6.5 cm. It is framed in a later black lacquered wooden miniature frame. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato