Chinese Song Dynasty Jizhou Ware 'Tortoiseshell' Bowl

A Chinese Jizhou ware bowl of conical form, probably Southern Song Dynasty, 12-13th century. The bowl is covered inside and out with a rich brown glaze which is liberally splashed with cream and blue-grey in imitation of tortoiseshell. Measures 16cm in diameter at the rim and 7cm tall. In excellent condition with no chips, cracks or restoration - please see all photos for confirmation.