Vase picnic flowers in black sandstone with white enamel

The vase is in perfect condition, no accidents, no shortages, no splinters. It was turned by a potter, and then enamelled with a beautiful white enamel a little milky and translucent, which lets guess the black earth in transparency. The coin is marked on the hollow reverse at the tip of a simple letter H. Pretty Work of French craftsmanship of the second half of the twentieth century.