A number of sancai-glazed ovoid jars with similarly moulded flowerhead medallions are found in a number of important collections. Compare the jar in the Museum of Oriental Ceramics, Osaka, which is registered as an Important Art Object, illustrated in Mayuyama, Seventy Years, Vol. 1, Tokyo, 1976, no. 226 (fig. 1); and another jar in the collection of the Art Institute of Chicago, illustrated by J. Mayuyama (ed.), Chinese Ceramics in the West, Tokyo, 1960, p. 5, no. 5. Another comparable jar of similar size but with the moulded medallions reserved on a green-glazed background, is illustrated by Masahiko Sato and Gakuji Hasebe, Sekai toji zenshu, Vol. 11, Tokyo, 1976, p. 48, no. 33.
The result of Oxford thermoluminescence test no. 666x55 (April 1994), is consistent with the dating of this lot.