Enamelled spherical ball by Jean and Renée 1981 MTC

Sublime Sphérique Ball Enamelled dlg René Ben Lisa, Artist's Signature where it is inscribed under Jean and Renée Ceramics of October 1, 1981 The Best Year of Ceramics of The Great Artists!! M.T.C (micro-techno-ceramic?) Spherical ball vase with shiny enamelled interior and matte enamelled exterior. I think this enamelled spherical ball vase is an artist's test or a prototype on a technique developed in 1981. !!! Photos are an integral part of the description !!! Size: HEIGHT: 11.5 cm. AU COL DIAMETER: 2.1 CM. DIAMETER AT THE BASE: 7.5 CM. MAXI DIAMETER: 11.5 cm. WEIGHT: 440g. . State. . Very good condition. See photos!