The bianhu was an innovation of the Eastern Zhou, introduced at about 400 BC, with production continued into the Han dynasty.
A number of comparable bronze bianhu have been published, consistently dated to the 4th/3rd centuries BC. See the exhibition Catalogue, Ancient Chinese Bronzes In The Collection of The Shanghai Museum, Hong Kong Museum of Art, 1983, pp. 122-123, no.43; Shang Zhou Qingtong Jiuqi Tezhan Tulu (Special Exhibition of the Shang and Zhou Dynasty Bronze Wine Vessels), Taiwan, 1989, Catalogue, p.211, pl.74; Ancient Chinese Arts in The Idemitsu Collection, Japan, 1989, pl.186, William Watson, Ancient Chinese Bronzes, London, 1962, pl.67b; and Jenny So, Eastern Zhou Ritual Bronzes from the Arthur M.Sackler Collections, vol.III, Washington D.C., 1995, p.279 and 282, fig.50.3.; and Schätze Chinas aus Museen der DDR, Roemer- und Pelizaeus Museum, Hildesheim, Germany, 1990, p. 111, pl. 9.