• Joseon Dynasty, second half of 15th-first half of 16th century
• Excavated from the buncheong kiln sites in Hakbong-ri, Gongju-si, Chuncheongnam-do Province
• bon 10437, 10480

These two buncheong ritual vessels were excavated from the Hakbong-ri kiln site in Gongju, Chungcheongnam-do Province. The iron-painted bo overall follows the form of the metal bo depicted in the illustrations of ritual vessels in the Five Rites of the Annals of King Sejong and its revised version, Gukjo oryeui seorye, though it differs in certain details. The jak (爵), a type of ritual wine cup, takes its name from its bird-like form—featuring a beak-like spout in front and a tail-like handle at the back, said to resemble a sparrow. It was placed at the foremost position on the ritual table and used for offerings of wine. This incised buncheong jak also differs in details from the bo shown in the illustrations of ritual vessels, suggesting that these vessels were not used in formal state rites but rather in local or regional ritual practices.