Stamped "D.M &Cie, Grigny Rhône". Dating from the 1830s / 1840s according to the stamp. The Grigny porcelain is fairly rare as the factory went bankrupt very quickly (1829-1843). It was then bought by someone else so a different stamp was used.
These plates were used so guests could play at the end of their meal. On each plate you have to guess one French saying (proverb). The answer to the puzzle is marked at the back of each plate. This one 'Pas de fumée sans feu' or 'No fire without smoke'
It has been used so have scratches and stains as can be seen in the photographs..