This industrial stool can be dated in the 1950s. It is a dynamic stool with a heavy metal spherical disk base, finished with rubber on the underside. You can sit on this stool, stay with your feet on the ground and move your ass (and feel the beat). The circular seat is covered with leatherette. The metal stem is adjustable in height (64-84 cm). This stool is in very good authentic condition. It seems that Achille Castiglioni knew this stool when he designed his Sella.