Qianlong-marked teadust-glazed vases of this size and form are rare, as most known examples of this form appear to bear Yongzheng seal marks, suggesting that the present vase may date to early in the Qianlong period. A Yongzheng-marked flambé-glazed vase of nearly identical form, although of slightly larger size (20.3 cm.) is in the Palace Museum collection, illustrated in Qingdai yuyao ciqi bowuguan cang, Beijing, 2005, pp. 306-7, no. 139. See, also, the Yongzheng-marked flambé vase of similar form, although also of slightly larger size (20.4 cm.), sold in our Hong Kong rooms, 27 May 2009, lot 1826.