Compare with two similar jars, one in Jenyns, Later Chinese Porcelain, p. XCI, fig. 2, the other illustrated in S.C. Ko Tianminlou Collection, Catalogue, vol. 1, no. 114. A covered jar is illustrated in Porcelain of the National Palace Museum, Enamelled Ware of the Ch'ing Dynasty, Book II, pls. 13 a-d.