Ceramic handle vase with vintage graphic decoration

The vase is in perfect condition, no accidents, no cracks or splinters. It is an enamelled sandstone of beautiful workmanship, the earth is dense, heavy, with a very fine grain. The blue-grey enamel is embellished with black and white graphic curly, composed of interlacing, dots, circles and stripes. Pretty shape of the vase a little ventrue, with a very thin handle. The coin is marked on the reverse with two digits with white enamel. Potter's work of the first half of the twentieth century.