DAOGUANG SIX CHARACTER SEAL-MARK IN UNDERGLAZE BLUE AND OF THE PERIOD (1821-1850)

Compare the present bowl and cover with an almost identical example from the Lai Family Collection, sold at Christie's New York, 17 September 2015, lot 913. See, also, a very similar bowl and cover, but with Guangxu mark, illustrated in Imperial Porcelain of Late Qing from the Kwan Collection, Art Gallery, The Chinese University of Hong Kong, 13 August - 25 September 1983, p. 131, no. 137.