Matsu-Kō zōin, old pot, handcrafted, shidei purple clay, outer rim rectangular with open corners, cut feet, base with maker's signature "Matsu-Kō zōin", classic form, excellent patina, vintage pot, distinct handcrafted marks, conservatively estimated over 45 years old, as shown in photos. Matsu-Kō zō, artist's real name Matsushita Reiji.
