A Dingyao vase with similar ribbed neck and raised collar around the shoulder is published in Zhongguo taoci quanji, vol. 9, Dingyao, Shanghai, 1981, no. 27. The present ewer also shares stylistic features with known Dingyao kundika, such as the example with a ribbed neck excavated from a temple site in Hebei dated to 995, illustrated by G. Hasebe, Sekai toji zenshu, vol. 12, Tokyo, 1977, p. 11, no. 2. See, also, the kundika of somewhat similar proportions, and with a raised collar around the shoulder, that was excavated in 1969 from Dingxian in Hebei, illustrated in Zhongguo taoci quanji, op. cit., no. 50.
The lack of a handle may indicate this extremely rare ewer may have been intended for ritualistic use, such as washing of the hands.