Cizhou-type vessels of this shape are believed to have evolved from metal prototypes. Although no metal vessel appears to have survived in China, bronze vessels of this type, but of slightly different shape, have been preserved in Korea, an example of which is illustrated by Y. Mino and K.R. Tsiang, Freedom of Clay and Brush Through Seven Centuries in Northern China: Tz'u-chou Type Wares, 960-1600 A.D., Indianapolis, 1981, p. 72, fig. 55.
A very similar censer is illustrated in the catalogue of the Memorial Exhibition of The Charles B. Hoyt Collection, 13 February-30 March 1952, Museum of Fine Arts, Boston, p. 70, no. 277. See, also, the example illustrated by R. Krahl, Chinese Ceramics in the Meiyintang Collection, vol. l, London, 1994, pp. 260-1, no. 476, where it is linked to Juluxian, because of its smooth, creamy surface.