An almost identical zhi and cover is illustrated in The Freer Chinese Bronzes, Catalogue, vol.I, no.71, pp.394-397 and by Lodge Wenley and Pope, A Descriptive and Illustrative Catalogue of Chinese Bronzes, pl.15, no.38.6; a second example is illustrated by Bernhard Karlgren, 'Some Characteristics of the Yin Art', B.M.F.E.A.,, Stockholm, no.34, pl.75b; cf. also the covered example formerly in the collection of Captain Spencer Churchill illustrated by Wiliam Watson, Ancient Chinese Bronzes, pl.12A