A good Chinese doucai flared bowl six character Daoguang mark and of the period 1821-50

A good Chinese doucai flared bowl six character Daoguang mark and of the period 1821-50, finely painted with five roundels of flowering trees divided by stylized pomegranate above a band of green and yellow lappets, 15cm. Provenance: an English private collection, formerly in the collection of Henry M. Knight (d.1971), Cf. Davids and Jellinek, Provenance, pp.276-280 for details about Henry Knight.