A GREEK MARBLE EXALEIPTRON
HELLENISTIC PERIOD, CIRCA 3RD CENTURY B.C.
With a hemispherical body and flat base, the rim flanged, with a deep concave curve, the body with a carinated edge, incised with concentric rings, the rounded disk lid with a knobbed finial and concentric grooves; once on a separately-made, now-missing pedestal
11½ in. (29.2 cm.) diameter