Six antique enamelled earth cut-cups

The small plates are in good condition, no accidents, no cracks or splinters. They are made of glazed earth, with light white enamel and a little milky that lets guess the earth in transparency, which gives it a slightly pinkish hue very delicate. The enamelling is cracked on some of them. The plates are very flat, with a small straight rim with hemmed edges. French regional craftsmanship of the first half of the twentieth century.