Cf. a larger Yongzheng vase (55.5 cm.) of this shape and with a guan-type glaze, sold in our London Rooms, 6 December 1993, lot 99; a vase of this rare shape and size, covered with a flambé glaze, from the Hall Family Collection, sold at Sotheby's Hong Kong, 2 May 2000, lot 536; and another with a robin's-egg glaze in the Beijing Palace Museum, illustrated in Kangxi Yongzheng Qianlong, Hong Kong, 1989, p. 290, pl. 119.