商 牙璧|Notched disc
Object type: Disc
Department: Asian Art
Culture: China
Period: Shang (ca. 1600–1046 B.C.) or Western Zhou (1046–771 B.C.)
Date: 13th–11th century B.C
Medium: Jade (nephrite)
Dimensions: Diam. 6 1/8 in. (15.6 cm)
Classification: Jade
Credit line: Rogers Fund, 1927
Accession year: 1927