DAOGUANG SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE CIRCLE AND OF THE PEROID (1821-1850)

The unusual decoration on this bowl can also be seen on a bowl of Qianlong date, of equally large size, but with deep rounded sides, illustrated in Zhongguo taoci daxi; qingdai taoci daquan, Taipei, 1987/89, p. 223.