YONGZHENG SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE SQUARE AND OF THE PERIOD (1723-1735)

A pair of Yongzheng-marked doucai cups of this design, but of slightly smaller size (7.3 cm. diam.), from the Edward T. Chow Collection, was sold at Sotheby Parke Bernet, Hong Kong, 25 November 1980, lot 132. See, also, the pair of Yongzheng-marked doucai bowls of similar disign but of larger size (11.9 cm. diam.) illustrated in Chinese Porcelain, The S. C. Ko Tianminlou Collection, Part I, Hong Kong, 1987, pl. 100.