5909080 Advertising chromolithography of Guerin Boutron chocolates (chromolithograph) by French School, (20th century); 48.35x29.76 cm; (add.info.: The Guerin Boutron family from Paris founded the company in around 1775. The factory produces chocolate, to retain its customers Guerin Boutron joined his tablets chromolithography on various topics, here the trees, the white spruce of Canada); Photo by Archives Toutain; French, out of copyright.