French Ceramic pitcher Art-Nouveau early twentieth

The pitcher is in perfect condition, no gaps, no cracks or splinters. It is a piece of very beautiful craftsmanship, the enamel is superb, satin almost matte, with an intense black, with almost metallic reflections. Typical shape of the art-nouveau period, with curves and interlacing forming the handle, like a stem, then veins evoking those of a leaf distributed on the belly. The pitcher is ventruous like a fruit, and completely asymmetrical. The piece is marked on the reverse under cover, but the signature is illegible.