SIX VARIOUS BLUE AND WHITE 'DRAGON' BOWLS, each with deep rounded sides and flaring rim, the exterior painted with two striding five-clawed dragons chasing flaming pearls amidst flame-scrolls and clouds above breaking waves and rocks, including one with a Kangxi six-character mark, a pair with Daoguang seal marks and of the period and three with iron-red Shen de tang zhi four-character marks, 19th Century