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

A very similar pair of bowls is illustrated in Chinese Porcelain, The S.C. Ko. Tianminlou Collection, Hong Kong, 1987, p.142, pl.100; and a larger example in the Palace Museum, Beijing, is recorded in The Complete Collection of Treasures of the Palace Museum, Porcelains in Polychrome and Contrasting Colours, Hong Kong, 1999, p.250, pl.229.