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1936 (the spelunker thinks)
Pelliot, P. Jades Archaiques de Chine appartenant a M. C T Loo, Paris and Brussels, 1925, pl. XVII(I)
Shina Kogyoku Zuroku (Chinese Jades), Tokyo and Kyoto, 1955, pl. LXXX(2).
Ming Wilson, Chinese Jades, No. 19
Purchased with the assistance of The Art Fund, the Vallentin Bequest, Sir Percival David and the Universities China Committee
ca. 1100 BC-1000 BC (made)
W. Zhou coiled dragon pendant
Diameter: 8.2 cm
Ayers and Rawson, Chinese Jade throughout the Ages (Victoria & Albert Museum 01/01/1975-31/12/1975)
China, room 44
Western Zhou dynasty
The pendant is shaped as a coiled dragon with its tail in its mouth.
Carved nephrite jade
Museum no. A.73-1936 
China, room 44, case 10
Nephrite jade, carved museum_number
Pendant in the form of a coiled dragon
Carved jade dragons or birds were worn as pendants in ancient China. When the owners died their pendants were buried with them. This piece in the form of a coiled dragon was made in the 12th-11th century BC, by which time jade carvers usually added more details to the surface.