Lot of 6 plates of grey earthenware made in France

Here is a batch of 6 hollow plates (4 cm high and 23 cm in diameter) made of grey earthenware made in france. They can go to the microwave and dishwasher and are in very good general condition / no brightness on the top and sides, just a plate on which there are two small ones on the bottom, but this does not create any weakening or imbalance of the plate (see last photo). Weight of just over 500 grams per plate.