YONGZHENG SEAL MARK IN UNDERGLAZE-BLUE AND OF THE PERIOD (1723-1735)

A very similar small vase, but with Qianlong mark, was sold at Sotheby's Paris, 18 December 2012, lot 223. Two further Qianlong-marked examples, one with a Guan-type glaze, the other with a Ge-type glaze, are illustrated in Porcelain Vases of the Imperial Qing - The Huaihaitang Collection, Hong Kong, 2007, nos. 36 and 48.