A pair of Japanese Arita Ko Imari Iroe Shell-Form dishes, Edo period (1603-1868), late 17th/Early 18th century, moulded in the form of abalone shells, with decoration in underglaze blue, overglaze enamels and gilding, depicting an underwater scene with molluscs and seaweeds. Four character mark in underglaze blue to the base reading 'Chenghua Nian Zhi'., each 3.5 cm high, 16 cm wide.